/* ============================================
   DESIGN SYSTEM - Monitor de Peso Pós-Parto
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Otimizado para Contraste WCAG AA */
    --primary: #6852D6;
    --primary-light: #9B8FFF;
    --primary-dark: #4A3AA3;
    --accent: #E85D75;
    --accent-light: #FF9BAB;
    --background-1: #F5F5FA;
    --background-2: #EBF8FF;
    --text-primary: #1A1A2E;
    --text-secondary: #4A4A5E;
    --text-light: #6B6B7E;
    --white: #FFFFFF;
    --error: #D63031;
    --success: #00B894;
    --warning: #F39C12;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-round: 50px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(120, 104, 230, 0.08);
    --shadow-md: 0 4px 16px rgba(120, 104, 230, 0.12);
    --shadow-lg: 0 8px 32px rgba(120, 104, 230, 0.15);
    --shadow-xl: 0 12px 48px rgba(120, 104, 230, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Typography */
    --font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--background-1) 0%, var(--background-2) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(184, 181, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(120, 104, 230, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(255, 180, 180, 0.1) 0%, transparent 50%);
    background-size: 100px 100px, 150px 150px, 80px 80px;
    z-index: -1;
    opacity: 0.8;
    animation: backgroundPulse 15s ease-in-out infinite;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 0.6; }
}

/* ============================================
   LAYOUT
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: var(--spacing-xl) 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
}

.header__brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    animation: slideDown 0.6s ease-out;
}

.header__logo {
    height: 80px;
    width: auto;
    min-width: 80px;
    max-width: 120px;
    object-fit: contain;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.2));
    transition: transform var(--transition-base);
}

.header__logo:hover {
    transform: scale(1.05);
}

.header__text {
    text-align: left;
    flex: 1;
    max-width: 600px;
}

.header__title {
    font-size: clamp(1.5rem, 4vw, var(--font-size-3xl));
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.15);
}

.header__subtitle {
    font-size: clamp(0.9rem, 2.5vw, var(--font-size-lg));
    opacity: 0.95;
    font-weight: 300;
}

/* Main Content */
.main {
    padding: var(--spacing-lg) 0 var(--spacing-xl) 0;
    min-height: calc(100vh - 250px);
}

.main.with-top-nav {
    padding-top: var(--spacing-sm);
}

/* Sections */
.section {
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.5s ease-out;
}

.section__title {
    font-size: clamp(1.5rem, 4vw, var(--font-size-3xl));
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
    text-align: center;
    font-weight: 700;
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-sm);
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--radius-lg);
    padding: clamp(1.5rem, 4vw, var(--spacing-lg));
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--primary), var(--accent));
    background-size: 200% 100%;
    animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ============================================
   WELCOME BANNER
   ============================================ */

.welcome-banner {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(184, 181, 255, 0.15) 0%, rgba(228, 251, 255, 0.15) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border: 2px solid rgba(104, 82, 214, 0.2);
}

.welcome-banner__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 8px 24px rgba(104, 82, 214, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

.welcome-banner__icon svg {
    color: var(--white);
}

.welcome-banner__logo {
    height: 50px;
    width: auto;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.welcome-banner__title {
    font-size: var(--font-size-3xl);
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.welcome-banner__text {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

.welcome-banner__info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.info-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 8px 16px;
    background: var(--white);
    border-radius: var(--radius-round);
    box-shadow: var(--shadow-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary-dark);
}

.info-badge svg {
    color: var(--primary);
}

/* ============================================
   PROFILE CARD
   ============================================ */

.profile-card {
    max-width: 700px;
    margin: 0 auto;
}

.profile-card__header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid rgba(104, 82, 214, 0.1);
}

.profile-card__step {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    border-radius: var(--radius-round);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.profile-card__title {
    font-size: var(--font-size-2xl);
    color: var(--primary-dark);
    font-weight: 700;
    margin: 0;
}

.form-card {
    max-width: 700px;
    margin: 0 auto;
}

.tips-card {
    max-width: 800px;
    margin: 0 auto;
}

/* ============================================
   FORMS
   ============================================ */

.form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form--modern {
    gap: var(--spacing-lg);
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

@media (max-width: 640px) {
    .form__row {
        grid-template-columns: 1fr;
    }
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    position: relative;
}

.form__label {
    font-weight: 600;
    color: var(--primary-dark);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.form__label svg {
    color: var(--primary);
}

.form__input {
    padding: 12px 16px;
    border: 2px solid var(--background-1);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-base);
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-primary);
}

.form__input:hover {
    border-color: var(--primary-light);
}

.form__input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(120, 104, 230, 0.15);
    background: var(--white);
    transform: translateY(-1px);
}

.form__input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

.form__input:invalid:not(:placeholder-shown) {
    border-color: var(--error);
}

.form__error {
    color: var(--error);
    font-size: var(--font-size-sm);
    font-weight: 500;
    min-height: 20px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.form__error:not(:empty)::before {
    content: '⚠';
    font-size: var(--font-size-base);
}

.form__hint {
    font-size: var(--font-size-xs);
    color: var(--text-light);
    font-style: italic;
    margin-top: -4px;
}

.form__tip {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(0, 184, 148, 0.08) 0%, rgba(0, 184, 148, 0.05) 100%);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--success);
    margin-top: var(--spacing-sm);
}

.form__tip svg {
    color: var(--success);
    min-width: 20px;
    margin-top: 2px;
}

.form__tip span {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 500;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius-round);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    text-align: center;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:active {
    transform: scale(0.98);
}

.btn--primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--secondary {
    background: linear-gradient(135deg, var(--background-2) 0%, var(--background-1) 100%);
    color: var(--primary-dark);
    border: 2px solid var(--primary);
    font-weight: 700;
}

.btn--secondary:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary-dark);
}

.btn--outline {
    background: transparent;
    color: var(--primary-dark);
    border: 2px solid var(--primary-dark);
    font-weight: 700;
}

.btn--outline:hover {
    background: var(--primary-dark);
    color: var(--white);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn--large {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
    font-weight: 700;
    width: 100%;
    justify-content: center;
}

.btn--large svg {
    width: 24px;
    height: 24px;
}

/* ============================================
   TOP NAVIGATION - Sticky Menu Diferenciado
   ============================================ */

.top-navigation {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: linear-gradient(135deg, rgba(237, 238, 247, 0.98) 0%, rgba(228, 251, 255, 0.98) 100%);
    box-shadow: 0 2px 12px rgba(104, 82, 214, 0.2);
    backdrop-filter: blur(10px);
    border-bottom: 3px solid var(--primary);
}

.top-nav__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-md);
}

.top-nav__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--primary-dark);
}

.top-nav__logo {
    height: 32px;
    width: auto;
    max-width: 40px;
    object-fit: contain;
    transition: transform var(--transition-base);
}

.top-nav__brand:hover .top-nav__logo {
    transform: scale(1.1);
}

.top-nav__text {
    white-space: nowrap;
    color: var(--text-primary);
}

.top-nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.top-nav__menu-header {
    display: none;
}

.top-nav__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 10px 18px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border: 2px solid transparent;
    border-radius: var(--radius-round);
    color: var(--white);
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.top-nav__item:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(104, 82, 214, 0.3);
}

.top-nav__item.active {
    background: var(--primary-dark);
    color: var(--white);
    border-color: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(74, 58, 163, 0.4);
}

.top-nav__item-icon {
    width: 20px;
    height: 20px;
    min-width: 20px;
    color: currentColor;
    transition: transform var(--transition-base);
}

.top-nav__item:hover .top-nav__item-icon {
    transform: scale(1.1);
}

.top-nav__item.active .top-nav__item-icon {
    filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.5));
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.hamburger:hover {
    background: rgba(104, 82, 214, 0.1);
}

.hamburger__line {
    width: 28px;
    height: 3px;
    background: var(--primary-dark);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hamburger.active .hamburger__line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active .hamburger__line:nth-child(2) {
    opacity: 0;
}

.hamburger.active .hamburger__line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Old Navigation - Hidden */
.navigation {
    display: none !important;
}

.nav-btn {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.95);
    border: 2px solid transparent;
    border-radius: var(--radius-round);
    color: var(--primary-dark);
    font-weight: 700;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-btn__icon {
    font-size: var(--font-size-lg);
    transition: transform var(--transition-base);
}

.nav-btn__text {
    transition: all var(--transition-base);
}

.nav-btn::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--primary);
    transition: transform var(--transition-base);
}

.nav-btn:hover {
    background: rgba(184, 181, 255, 0.2);
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

.nav-btn:hover .nav-btn__icon {
    transform: scale(1.2) rotate(5deg);
}

.nav-btn:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.nav-btn.active .nav-btn__icon {
    transform: scale(1.1);
    animation: pulse 2s ease-in-out infinite;
}

.nav-btn.active::after {
    display: none;
}

/* ============================================
   CHART
   ============================================ */

.chart-container {
    width: 100%;
    max-width: 540px; /* Container para canvas 500x500 + padding */
    height: 540px; /* Altura fixa */
    margin: var(--spacing-md) auto; /* Centraliza */
    background: #FFFFFF;
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(104, 82, 214, 0.1);
    position: relative;
}

#weightChart {
    display: block;
    margin: 0 auto;
}

/* Section Banners */
.section-banner {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(184, 181, 255, 0.1) 0%, rgba(228, 251, 255, 0.1) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border: 2px solid rgba(104, 82, 214, 0.15);
}

.section-banner__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    min-width: 64px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.section-banner__icon svg {
    color: var(--white);
}

.section-banner__content {
    flex: 1;
}

.section-banner__title {
    font-size: var(--font-size-2xl);
    color: var(--primary-dark);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.section-banner__text {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.6;
}

@media (max-width: 640px) {
    .section-banner {
        flex-direction: column;
        text-align: center;
    }
    
    .section-banner__icon {
        width: 56px;
        height: 56px;
    }
    
    .section-banner__title {
        font-size: var(--font-size-xl);
    }
    
    .section-banner__text {
        font-size: var(--font-size-sm);
    }
}

/* Progress Stats */
.progress-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.progress-stats--featured {
    margin-top: 0;
}

.stat {
    text-align: center;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(184, 181, 255, 0.1) 0%, rgba(228, 251, 255, 0.1) 100%);
    border-radius: var(--radius-md);
    border: 1px solid rgba(184, 181, 255, 0.3);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat--featured {
    padding: var(--spacing-lg);
    background: var(--white);
    box-shadow: var(--shadow-md);
}

.stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.stat__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
}

.stat__icon--success {
    background: linear-gradient(135deg, rgba(0, 184, 148, 0.15) 0%, rgba(0, 184, 148, 0.1) 100%);
    color: var(--success);
}

.stat__icon--primary {
    background: linear-gradient(135deg, rgba(104, 82, 214, 0.15) 0%, rgba(155, 143, 255, 0.1) 100%);
    color: var(--primary);
}

.stat__icon--accent {
    background: linear-gradient(135deg, rgba(232, 93, 117, 0.15) 0%, rgba(232, 93, 117, 0.1) 100%);
    color: var(--accent);
}

.stat__label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat__value {
    display: block;
    font-size: clamp(1.5rem, 4vw, var(--font-size-3xl));
    font-weight: 800;
    color: var(--text-primary);
}

/* Chart Header */
.chart-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid rgba(104, 82, 214, 0.1);
}

.chart-header__title {
    font-size: var(--font-size-xl);
    color: var(--primary-dark);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.chart-header__subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ============================================
   TIPS
   ============================================ */

.tips-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid rgba(104, 82, 214, 0.1);
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.tips-header__title {
    font-size: var(--font-size-xl);
    color: var(--primary-dark);
    font-weight: 700;
    margin: 0;
}

.btn--icon {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.tips-container {
    margin-bottom: var(--spacing-lg);
    min-height: 120px;
}

.tip {
    background: linear-gradient(135deg, rgba(228, 251, 255, 0.6) 0%, rgba(237, 238, 247, 0.6) 100%);
    border-left: 4px solid var(--primary);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    position: relative;
    transition: all var(--transition-base);
    backdrop-filter: blur(5px);
    box-shadow: var(--shadow-sm);
}

.tip:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
    border-left-width: 6px;
}

.tip__category {
    font-weight: 800;
    color: var(--primary-dark);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.tip__category::before {
    content: '⭐';
    font-size: var(--font-size-base);
}

.tip__content {
    color: var(--text-primary);
    line-height: 1.8;
    font-size: var(--font-size-base);
    font-weight: 400;
}

.tips-footer {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 2px solid rgba(104, 82, 214, 0.1);
}

.tips-footer__info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    justify-content: center;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-style: italic;
}

.tips-footer__info svg {
    color: var(--primary);
}

/* ============================================
   FAQ LINK & FOOTER
   ============================================ */

.faq-link {
    text-align: center;
    margin: var(--spacing-xl) 0;
}

.footer {
    background: var(--primary);
    color: var(--white);
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
    box-shadow: 0 -4px 20px rgba(120, 104, 230, 0.2);
}

.footer__links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.footer__link {
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

.footer__link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.footer__separator {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}

.footer__text {
    font-size: var(--font-size-sm);
    opacity: 0.95;
    margin-bottom: var(--spacing-xs);
}

.footer__copyright {
    font-size: var(--font-size-xs);
    opacity: 0.8;
    font-weight: 300;
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: #FFFFFF;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: 1000;
    animation: slideInRight 0.3s ease-out;
    max-width: 400px;
    border: 2px solid #E8EAF0;
    border-left: 5px solid var(--primary);
}

.toast--success {
    border-left-color: var(--success);
    background: #FFFFFF;
}

.toast--success .toast__icon {
    color: var(--success);
    background: rgba(0, 184, 148, 0.1);
    padding: 8px;
    border-radius: 50%;
}

.toast--error {
    border-left-color: var(--error);
    background: #FFFFFF;
}

.toast--error .toast__icon {
    color: var(--error);
    background: rgba(214, 48, 49, 0.1);
    padding: 8px;
    border-radius: 50%;
}

.toast--warning {
    border-left-color: var(--warning);
    background: #FFFFFF;
}

.toast--warning .toast__icon {
    color: var(--warning);
    background: rgba(243, 156, 18, 0.1);
    padding: 8px;
    border-radius: 50%;
}

.toast__icon {
    font-size: var(--font-size-xl);
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
}

.toast__message {
    flex: 1;
    color: #000000;
    font-size: var(--font-size-base);
    font-weight: 600;
    line-height: 1.4;
}

.toast__close {
    background: transparent;
    border: none;
    color: #6B6B7E;
    font-size: var(--font-size-2xl);
    font-weight: bold;
    cursor: pointer;
    padding: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
    line-height: 1;
}

.toast__close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #000000;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(0.95);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

.fade-in {
    animation: fadeInUp 0.5s ease-out;
}

.slide-up {
    animation: slideUp 0.3s ease-out;
}

/* ============================================
   LOADING STATES
   ============================================ */

.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid var(--primary-light);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablets - Menu completo mas compacto */
@media (max-width: 1024px) and (min-width: 769px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .top-nav__item {
        padding: 8px 14px;
        font-size: var(--font-size-xs);
    }
    
    .top-nav__item-icon {
        font-size: var(--font-size-base);
    }
    
    .chart-container {
        height: auto;
        min-height: 400px;
        padding: 16px;
        max-width: 100%;
    }
}

/* Tablets Geral */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .chart-container {
        max-width: 100%;
    }
}

/* Mobile Large - Hamburger Menu */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 1.5rem;
    }
    
    .header {
        padding: var(--spacing-md) 0;
        position: relative;
        z-index: 1;
    }
    
    .header__brand {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .header__text {
        text-align: center;
    }
    
    .header__logo {
        height: 60px;
        min-width: 60px;
    }
    
    .header__title {
        font-size: var(--font-size-2xl);
        margin-bottom: 0.25rem;
    }
    
    .header__subtitle {
        font-size: var(--font-size-sm);
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    /* Hamburger Menu Mobile */
    .hamburger {
        display: flex;
    }
    
    .top-nav__text {
        font-size: var(--font-size-sm);
    }
    
    .top-nav__brand {
        font-size: var(--font-size-base);
    }
    
    .top-nav__menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: linear-gradient(180deg, rgba(245, 245, 250, 0.98) 0%, rgba(235, 248, 255, 0.98) 100%);
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        box-shadow: 0 12px 40px rgba(104, 82, 214, 0.25);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all var(--transition-slow);
        max-height: calc(100vh - 120px);
        overflow-y: auto;
        border-bottom: 4px solid var(--primary);
        backdrop-filter: blur(15px);
        z-index: 101;
    }
    
    .top-nav__menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .top-nav__item {
        width: 100%;
        justify-content: flex-start;
        padding: 18px 20px;
        font-size: var(--font-size-lg);
        border-radius: var(--radius-md);
        background: rgba(255, 255, 255, 0.8);
        border: 2px solid transparent;
        box-shadow: 0 2px 8px rgba(104, 82, 214, 0.1);
    }
    
    .top-nav__item:active {
        transform: scale(0.98);
    }
    
    .top-nav__item-icon {
        width: 24px;
        height: 24px;
        transition: transform var(--transition-base);
    }
    
    .top-nav__item:hover .top-nav__item-icon {
        transform: scale(1.15);
    }
    
    .top-nav__item-text {
        font-weight: 600;
        font-size: var(--font-size-base);
    }
    
    .top-nav__menu-header {
        display: block;
        padding: 0 var(--spacing-xs) var(--spacing-sm);
        border-bottom: 2px solid rgba(104, 82, 214, 0.2);
        margin-bottom: var(--spacing-xs);
    }
    
    .top-nav__menu-title {
        font-size: var(--font-size-sm);
        font-weight: 700;
        color: var(--primary-dark);
        text-transform: uppercase;
        letter-spacing: 1px;
    }
    
    .top-nav__item + .top-nav__item {
        margin-top: var(--spacing-xs);
    }
    
    .progress-stats {
        grid-template-columns: 1fr;
    }
    
    .chart-container {
        height: auto;
        min-height: 340px;
        padding: 12px;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .toast {
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
    }
}

/* Mobile Small */
@media (max-width: 480px) {
    .header {
        padding: var(--spacing-sm) 0;
    }
    
    .header__brand {
        gap: var(--spacing-xs);
    }
    
    .header__logo {
        height: 48px;
        min-width: 48px;
    }
    
    .header__title {
        font-size: var(--font-size-xl);
        margin-bottom: 0.25rem;
    }
    
    .header__subtitle {
        font-size: var(--font-size-xs);
    }
    
    .top-nav__logo {
        height: 28px;
        max-width: 32px;
    }
    
    .card {
        padding: var(--spacing-sm);
        border-radius: var(--radius-md);
    }
    
    .chart-container {
        height: auto;
        min-height: 300px;
        padding: 10px;
    }
    
    .form__input {
        font-size: 16px; /* Prevent zoom on iOS */
    }
    
    .stat {
        padding: var(--spacing-sm);
    }
    
    .top-nav__brand {
        font-size: var(--font-size-sm);
    }
    
    .top-nav__icon {
        font-size: var(--font-size-lg);
    }
    
    .top-nav__text {
        font-size: var(--font-size-xs);
    }
    
    .welcome-banner {
        padding: var(--spacing-md);
    }
    
    .welcome-banner__icon {
        width: 60px;
        height: 60px;
    }
    
    .welcome-banner__icon svg {
        width: 40px;
        height: 40px;
    }
    
    .welcome-banner__title {
        font-size: var(--font-size-xl);
    }
    
    .welcome-banner__text {
        font-size: var(--font-size-base);
    }
    
    .info-badge {
        font-size: var(--font-size-xs);
        padding: 6px 12px;
    }
}

/* Menu Overlay para Mobile */
@media (max-width: 768px) {
    .top-navigation {
        position: relative;
    }
    
    body.menu-open {
        overflow: hidden;
    }
    
    body.menu-open::after {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 99;
        animation: fadeIn 0.3s ease;
    }
}

/* Landscape Mode em Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .header {
        padding: var(--spacing-xs) 0;
    }
    
    .header__brand {
        gap: var(--spacing-sm);
    }
    
    .header__logo {
        height: 40px;
        min-width: 40px;
    }
    
    .header__title {
        font-size: var(--font-size-lg);
        margin-bottom: 0;
    }
    
    .header__subtitle {
        font-size: var(--font-size-xs);
    }
    
    .top-nav__content {
        padding: var(--spacing-xs) 0;
    }
    
    .chart-container {
        min-height: 300px;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    body {
        background: white;
    }
    
    body::before {
        display: none;
    }
    
    .header,
    .footer,
    .navigation,
    .btn,
    .faq-link {
        display: none;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus Visible */
*:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast */
@media (prefers-contrast: high) {
    .card {
        border: 2px solid var(--text-primary);
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --primary: #9B8FFF;
        --primary-light: #B8B5FF;
        --primary-dark: #7868E6;
        --text-primary: #F0F0F5;
        --text-secondary: #C0C0D0;
        --text-light: #A0A0B0;
        --background-1: #1A1A2E;
        --background-2: #16213E;
    }
    
    body {
        background: linear-gradient(135deg, var(--background-1) 0%, var(--background-2) 100%);
    }
    
    .card {
        background: rgba(35, 35, 55, 0.95);
        border-color: rgba(255, 255, 255, 0.15);
    }
    
    .form__input {
        background: rgba(255, 255, 255, 0.08);
        color: var(--text-primary);
        border-color: rgba(255, 255, 255, 0.2);
    }
    
    .form__input:focus {
        border-color: var(--primary-light);
        background: rgba(255, 255, 255, 0.12);
    }
    
    .nav-btn {
        background: rgba(255, 255, 255, 0.1);
        color: var(--text-primary);
    }
    
    .nav-btn:hover {
        background: rgba(255, 255, 255, 0.15);
    }
    
    .tip {
        background: rgba(255, 255, 255, 0.05);
        border-left-color: var(--primary-light);
    }
    
    .chart-container {
        background: rgba(35, 35, 55, 0.98);
        border-color: rgba(255, 255, 255, 0.15);
    }
    
    #weightChart {
        filter: brightness(0.95);
    }
    
    .navigation {
        background: linear-gradient(135deg, rgba(35, 35, 55, 0.95) 0%, rgba(26, 26, 46, 0.95) 100%);
        border-color: rgba(255, 255, 255, 0.1);
    }
    
    .stat {
        background: linear-gradient(135deg, rgba(155, 143, 255, 0.15) 0%, rgba(184, 181, 255, 0.1) 100%);
        border-color: rgba(255, 255, 255, 0.2);
    }
    
    .toast {
        background: rgba(35, 35, 55, 0.98);
        border-color: rgba(255, 255, 255, 0.2);
    }
    
    .toast__message {
        color: #F0F0F5;
    }
    
    .top-navigation {
        background: linear-gradient(135deg, rgba(35, 35, 55, 0.98) 0%, rgba(26, 26, 46, 0.98) 100%);
    }
    
    .top-nav__brand {
        color: var(--white);
    }
    
    .top-nav__menu {
        background: linear-gradient(180deg, rgba(35, 35, 55, 0.98) 0%, rgba(26, 26, 46, 0.98) 100%);
    }
    
    .top-nav__item {
        background: rgba(255, 255, 255, 0.1);
    }
    
    .top-nav__item:hover {
        background: rgba(255, 255, 255, 0.15);
    }
    
    .top-nav__menu-title {
        color: var(--primary-light);
    }
}