* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Tajawal', sans-serif;
}

:root {
    /* الألوان للواجهة التعريفية والتطبيق */
    --primary: #2E7D32;
    --primary-dark: #1B5E20;
    --primary-light: #4CAF50;
    --secondary: #2c3e50;
    --accent: #e67e22;
    --dark: #1a1a1a;
    --darker: #0f0f0f;
    --light: #f8f9fa;
    --text: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --bg: #f5f5f5;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.16);
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

[data-theme="dark"] {
    --primary: #66BB6A;
    --primary-dark: #43A047;
    --primary-light: #81C784;
    --secondary: #95a5a6;
    --dark: #ffffff;
    --darker: #f0f0f0;
    --light: #263238;
    --text: #ECEFF1;
    --text-light: #bdc3c7;
    --white: #1E2B3A;
    --bg: #16202A;
    --glass-bg: rgba(0, 0, 0, 0.2);
    --glass-border: rgba(255, 255, 255, 0.1);
}

body {
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    transition: var(--transition);
    overflow-x: hidden;
}

/* ========== الواجهة التقديمية ========== */
.presentation-screen {
    position: relative;
    z-index: 1000;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

/* شريط التنقل العلوي */
.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 50px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.nav-bar.scrolled {
    padding: 15px 50px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.nav-bar.scrolled .logo,
.nav-bar.scrolled .nav-btn {
    color: var(--text);
}

.logo {
    font-size: 2rem;
    font-weight: 900;
    color: white;
    text-decoration: none;
    letter-spacing: 2px;
}

.nav-buttons {
    display: flex;
    gap: 15px;
}

.nav-btn {
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: 1rem;
}

.nav-btn.login {
    background: transparent;
    border: 2px solid white;
    color: white;
}

.nav-btn.register {
    background: white;
    color: var(--primary);
    border: 2px solid white;
}

.nav-btn.login:hover {
    background: white;
    color: var(--primary);
}

.nav-btn.register:hover {
    background: transparent;
    color: white;
}

/* أقسام العرض التقديمي */
.presentation-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 50px;
    position: relative;
    overflow: hidden;
}

/* القسم الأول - Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.hero-text {
    animation: slideRight 0.8s ease;
}

.hero-text .badge {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 8px 20px;
    border-radius: 90px;
    display: inline-block;
    margin-bottom: 20px;
    font-weight: 500;
    font-size: 1.1rem;
}

.hero-text h1 {
    font-size: 4.5em;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.hero-text p {
    font-size: 1.3em;
    margin-bottom: 30px;
    line-height: 1.8;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    background: rgba(255,255,255,0.1);
    padding: 15px 25px;
    border-radius: 20px;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.2);
}

.stat-number {
    font-size: 2.5em;
    font-weight: 900;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: float 3s ease-in-out infinite;
}

.food-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    max-width: 400px;
}

.icon-circle {
    width: 100px;
    height: 100px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(5px);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    border: 2px solid rgba(255,255,255,0.3);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.icon-circle:hover {
    transform: scale(1.1) rotate(5deg);
    background: rgba(255,255,255,0.25);
    border-color: rgba(255,255,255,0.5);
}

.icon-circle:nth-child(2) { animation-delay: 0.2s; }
.icon-circle:nth-child(3) { animation-delay: 0.4s; }
.icon-circle:nth-child(4) { animation-delay: 0.6s; }

/* القسم الثاني - المشكلة */
.problem-section {
    background: var(--white);
}

.section-content {
    max-width: 1200px;
    width: 100%;
    text-align: center;
}

.section-title {
    font-size: 3em;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text);
}

.section-subtitle {
    font-size: 1.2em;
    color: var(--text-light);
    margin-bottom: 60px;
}

.problem-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.problem-card {
    padding: 40px;
    background: var(--light);
    border-radius: 30px;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(50px);
}

.problem-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.problem-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.problem-icon {
    font-size: 4em;
    margin-bottom: 20px;
    color: var(--primary);
}

.problem-card h3 {
    font-size: 1.8em;
    margin-bottom: 15px;
}

.problem-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* القسم الثالث - الحل */
.solution-section {
    background: linear-gradient(135deg, var(--light) 0%, var(--bg) 100%);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 40px;
}

.solution-item {
    background: var(--white);
    padding: 40px;
    border-radius: 30px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateX(-50px);
    transition: var(--transition);
}

.solution-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.solution-item:nth-child(even) {
    transform: translateX(50px);
}

.solution-item:nth-child(even).visible {
    transform: translateX(0);
}

.solution-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.solution-icon {
    font-size: 3em;
    color: var(--primary);
    margin-bottom: 20px;
}

.solution-item h3 {
    font-size: 1.8em;
    margin-bottom: 15px;
}

.solution-item p {
    color: var(--text-light);
    line-height: 1.8;
}

/* القسم الرابع - المميزات */
.features-section {
    background: var(--white);
}

.features-showcase {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin: 20px 0;
    width: 100%;
}

.feature-card {
    background: var(--light);
    border-radius: 25px;
    padding: 25px 15px;
    text-align: center;
    min-height: 200px;
    transition: var(--transition);
    opacity: 0;
    transform: scale(0.9);
}

.feature-card.visible {
    opacity: 1;
    transform: scale(1);
}

.feature-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3.5em;
    margin-bottom: 20px;
    color: var(--primary);
}

.feature-card h3 {
    font-size: 1.3em;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* القسم الخامس - كيفية العمل */
.how-it-works-section {
    background: var(--light);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin: 60px 0;
}

.step {
    text-align: center;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
}

.step.visible {
    opacity: 1;
    transform: translateY(0);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8em;
    font-weight: 700;
    margin: 0 auto 20px;
    box-shadow: 0 10px 30px rgba(46, 125, 50, 0.3);
}

.step h3 {
    font-size: 1.8em;
    margin-bottom: 15px;
}

.step p {
    color: var(--text-light);
    line-height: 1.8;
}

/* القسم السادس - دعوة للتسجيل */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.cta-content {
    text-align: center;
    max-width: 800px;
}

.cta-content h2 {
    font-size: 3.5em;
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 1.3em;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.cta-btn {
    padding: 18px 45px;
    font-size: 1.2em;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.cta-btn.primary {
    background: white;
    color: var(--primary);
}

.cta-btn.secondary {
    background: transparent;
    border: 2px solid white;
    color: white;
}

.cta-btn.primary:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

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

/* الفوتر */
.footer {
    background: var(--primary-dark);
    color: white;
    padding: 50px;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
}

.copyright {
    opacity: 0.6;
    font-size: 0.9rem;
}

/* مؤشر التقدم */
.progress-indicator {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.progress-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.progress-dot.active {
    background: white;
    transform: scale(1.3);
    box-shadow: 0 0 20px white;
}

.progress-dot:hover {
    background: white;
}

/* ========== التطبيق الرئيسي ========== */
.main-app {
    display: none;
    padding: 30px;
    min-height: 100vh;
    background: var(--bg);
    position: relative;
}

.app-container {
    display: flex;
    gap: 30px;
    min-height: calc(100vh - 60px);
    animation: fadeScale 0.8s ease-out;
}

@keyframes fadeScale {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.sidebar {
    width: 320px;
    background: var(--white);
    border-radius: 50px 20px 50px 20px;
    padding: 30px;
    height: fit-content;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 30px;
    overflow: hidden;
    transition: var(--transition);
}

.sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--primary));
    background-size: 200% 100%;
    animation: gradientMove 3s linear infinite;
}

@keyframes gradientMove {
    0% { background-position: 0% 0; }
    100% { background-position: 200% 0; }
}

.user-info {
    text-align: center;
    padding: 20px 0;
    border-bottom: 2px solid var(--light);
    margin-bottom: 20px;
    position: relative;
}

.user-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50% 50% 30% 70%;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 3em;
    font-weight: 600;
    border: 4px solid var(--light);
    transition: var(--transition);
    animation: rotateBorder 10s linear infinite;
}

@keyframes rotateBorder {
    0% { border-radius: 50% 50% 30% 70%; }
    25% { border-radius: 30% 70% 50% 50%; }
    50% { border-radius: 50% 50% 70% 30%; }
    75% { border-radius: 70% 30% 50% 50%; }
    100% { border-radius: 50% 50% 30% 70%; }
}

.user-avatar:hover {
    transform: scale(1.1) rotate(5deg);
}

.user-name {
    font-size: 1.5em;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.user-points {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: var(--white);
    padding: 10px 25px;
    border-radius: 40px;
    display: inline-block;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(46, 125, 50, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.nav-menu {
    list-style: none;
    margin: 30px 0;
}

.nav-item {
    padding: 18px 20px;
    margin: 8px 0;
    border-radius: 30px 10px 30px 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text);
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--primary);
    transform: scaleY(0);
    transition: var(--transition);
}

.nav-item:hover::before,
.nav-item.active::before {
    transform: scaleY(1);
}

.nav-item:hover,
.nav-item.active {
    background: var(--light);
    color: var(--primary);
    transform: translateX(5px);
    box-shadow: var(--shadow-sm);
}

.nav-item i {
    width: 30px;
    color: var(--primary);
    font-size: 1.2rem;
}

.badge {
    margin-left: auto;
    background: var(--primary);
    color: var(--white);
    padding: 5px 12px;
    border-radius: 40px;
    font-size: 0.85rem;
    animation: pulse 2s ease-in-out infinite;
}

.daily-tip {
    margin-top: 30px;
    padding: 25px;
    background: linear-gradient(135deg, var(--light) 0%, var(--bg) 100%);
    border-radius: 30px 10px 30px 10px;
    border-left: 4px solid var(--primary);
    animation: slideInRight 0.5s ease-out;
}

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

.daily-tip-title {
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.main-content {
    flex: 1;
    background: var(--white);
    border-radius: 60px 20px 60px 20px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    animation: contentFade 0.6s ease-out;
}

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

.page-title {
    font-size: 2.5em;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--text);
    position: relative;
    display: inline-block;
}

.page-title::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 60%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), transparent);
    animation: lineGrow 0.6s ease-out;
}

@keyframes lineGrow {
    from { width: 0; }
    to { width: 60%; }
}

.page-subtitle {
    color: var(--text-light);
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--light);
    padding: 30px;
    border-radius: 40px 10px 40px 10px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    animation: statPop 0.5s ease-out;
    animation-fill-mode: both;
}

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:nth-child(4) { animation-delay: 0.4s; }

@keyframes statPop {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary) 0%, transparent 100%);
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card:hover::before {
    opacity: 0.1;
}

.stat-value {
    font-size: 3em;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
}

.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
}

.food-item {
    background: var(--light);
    border-radius: 40px 10px 40px 10px;
    padding: 25px;
    position: relative;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
    cursor: pointer;
    animation: itemSlide 0.5s ease-out;
    animation-fill-mode: both;
}

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

.food-item:nth-child(odd) { animation-delay: 0.1s; }
.food-item:nth-child(even) { animation-delay: 0.2s; }

.food-item:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.status-indicator {
    width: 8px;
    height: 70px;
    border-radius: 4px;
    transition: var(--transition);
}

.status-safe {
    background: linear-gradient(to bottom, #2ecc71, #27ae60);
    box-shadow: 0 0 15px #2ecc71;
}

.status-warning {
    background: linear-gradient(to bottom, #f39c12, #e67e22);
    box-shadow: 0 0 15px #f39c12;
}

.status-danger {
    background: linear-gradient(to bottom, #e74c3c, #c0392b);
    box-shadow: 0 0 15px #e74c3c;
}

.food-name {
    font-weight: 700;
    font-size: 1.4em;
    color: var(--text);
    margin-bottom: 5px;
}

.food-expiry {
    background: var(--white);
    padding: 5px 15px;
    border-radius: 40px;
    display: inline-block;
    font-size: 0.9rem;
    margin-top: 8px;
}

.days-left {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--white);
    color: var(--text);
    padding: 5px 15px;
    border-radius: 40px;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
    animation: pulse 2s ease-in-out infinite;
}

.empty-state {
    text-align: center;
    padding: 80px;
    background: var(--light);
    border-radius: 60px 20px 60px 20px;
    animation: emptyState 0.8s ease-out;
}

@keyframes emptyState {
    from { opacity: 0; transform: scale(0.8) rotate(-2deg); }
    to { opacity: 1; transform: scale(1) rotate(0); }
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(46, 125, 50, 0.4);
}

.btn-outline {
    border: 2px solid var(--primary);
    color: var(--primary);
    background: transparent;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

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

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 18px 22px;
    border: 2px solid var(--light);
    border-radius: 18px;
    background: var(--bg);
    color: var(--text);
    font-size: 1.1rem;
    transition: var(--transition);
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
}

.category-suggest,
.storage-tip {
    background: var(--light);
    padding: 15px 20px;
    border-radius: 14px;
    margin-top: 8px;
    border-left: 4px solid var(--primary);
}

.recipes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
}

.recipe-card {
    background: var(--light);
    border-radius: 40px 10px 40px 10px;
    padding: 28px;
    cursor: pointer;
    transition: var(--transition);
}

.recipe-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.recipe-points {
    background: var(--primary);
    color: white;
    padding: 8px 15px;
    border-radius: 40px;
    display: inline-block;
}

.recipe-title {
    font-size: 1.5em;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text);
}

.recipe-ingredients {
    background: var(--white);
    padding: 15px;
    border-radius: 14px;
    margin-bottom: 18px;
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    padding: 20px 25px;
    background: var(--light);
    border-radius: 40px 10px 40px 10px;
    gap: 25px;
}

.rank {
    width: 50px;
    height: 50px;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.3rem;
}

.leaderboard-name {
    font-weight: 600;
    font-size: 1.2rem;
}

.leaderboard-points {
    margin-left: auto;
    background: var(--white);
    padding: 8px 20px;
    border-radius: 40px;
    color: var(--primary);
    font-weight: 700;
}

/* ========== المودالات ========== */
.auth-modal, .recipe-modal, .share-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.auth-container, .recipe-modal-content, .share-modal-content {
    background: var(--white);
    padding: 40px;
    border-radius: 60px 20px 60px 20px;
    width: 90%;
    max-width: 450px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: scale(0.9);
    animation: modalPop 0.3s ease-out forwards;
}

@keyframes modalPop {
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

.auth-tab {
    flex: 1;
    padding: 14px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    background: var(--light);
    color: var(--text);
    transition: var(--transition);
}

.auth-tab.active {
    background: var(--primary);
    color: white;
}

.auth-form input {
    width: 100%;
    padding: 16px;
    margin-bottom: 15px;
    border: 2px solid var(--light);
    border-radius: 12px;
    background: var(--bg);
    color: var(--text);
}

.auth-form .btn-primary {
    width: 100%;
    padding: 16px;
}

.recipe-modal {
    z-index: 3000;
}

.recipe-modal-content {
    max-height: 80vh;
    overflow-y: auto;
}

.recipe-modal-title {
    font-size: 2em;
    margin-bottom: 20px;
    color: var(--primary);
}

.notifications-panel {
    position: fixed;
    top: 30px;
    left: 30px;
    z-index: 4000;
}

.notification {
    background: var(--white);
    color: var(--text);
    padding: 18px 30px;
    border-radius: 30px 10px 30px 10px;
    margin-bottom: 10px;
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary);
    min-width: 300px;
    opacity: 0;
    transform: translateX(-100%);
    animation: slideIn 0.3s ease-out forwards;
}

.notification.error { border-left-color: #e74c3c; }
.notification.warning { border-left-color: #f39c12; }

/* ========== Responsive ========== */
@media (max-width: 1200px) {
    .features-showcase { grid-template-columns: repeat(2, 1fr); }
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-stats { justify-content: center; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
    .problem-cards,
    .solution-grid,
    .steps-container {
        grid-template-columns: 1fr;
    }
    .app-container { flex-direction: column; }
    .sidebar { width: 100%; position: static; }
    .nav-menu { display: grid; grid-template-columns: repeat(3, 1fr); }
    .user-info { display: flex; align-items: center; gap: 20px; text-align: left; }
    .user-avatar { margin: 0; }
}

@media (max-width: 768px) {
    .nav-bar { padding: 15px 20px; }
    .hero-text h1 { font-size: 3em; }
    .section-title { font-size: 2.5em; }
    .features-showcase { grid-template-columns: 1fr; }
    .progress-indicator { display: none; }
    .cta-buttons { flex-direction: column; }
    .nav-buttons { gap: 10px; }
    .nav-btn { padding: 8px 15px; font-size: 0.9rem; }
    .icon-circle { width: 70px; height: 70px; font-size: 2rem; }
    .nav-menu { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: 1fr; }
    .main-content { padding: 25px; }
}

@media (max-width: 576px) {
    .nav-menu { grid-template-columns: 1fr; }
    .user-info { flex-direction: column; text-align: center; }
    .user-avatar { margin: 0 auto; }
}

@keyframes slideRight {
    from { opacity: 0; transform: translateX(-100px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes slideOut {
    to { transform: translateX(120%); opacity: 0; }
}

@keyframes slideIn {
    from { transform: translateX(-120%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.btn-logout {
    background: #e74c3c !important;
}

.btn-logout:hover {
    background: #c0392b !important;
}
/* ========== تحسينات إضافية للجوال ========== */

/* تحسين شريط التنقل للجوال */
@media (max-width: 480px) {
    .nav-bar {
        padding: 10px 15px !important;
    }

    .logo {
        font-size: 1.5rem !important;
    }

    .nav-buttons {
        gap: 5px !important;
    }

    .nav-btn {
        padding: 6px 12px !important;
        font-size: 0.8rem !important;
    }

    .hero-text h1 {
        font-size: 2.2em !important;
        line-height: 1.3 !important;
    }

    .hero-text p {
        font-size: 1rem !important;
        margin-bottom: 20px !important;
    }

    .hero-text .badge {
        font-size: 0.8rem !important;
        padding: 5px 12px !important;
    }

    .food-icons {
        gap: 8px !important;
    }

    .icon-circle {
        width: 45px !important;
        height: 45px !important;
        font-size: 1.5rem !important;
    }

    .section-title {
        font-size: 1.8em !important;
    }

    .section-subtitle {
        font-size: 0.95rem !important;
        margin-bottom: 30px !important;
    }

    .problem-card, .solution-item, .feature-card {
        padding: 20px 15px !important;
    }

    .problem-icon, .solution-icon, .feature-icon {
        font-size: 2.5em !important;
    }

    .problem-card h3, .solution-item h3, .feature-card h3 {
        font-size: 1.3em !important;
    }

    .step-number {
        width: 45px !important;
        height: 45px !important;
        font-size: 1.3em !important;
    }

    .step h3 {
        font-size: 1.3em !important;
    }

    .cta-content h2 {
        font-size: 2em !important;
    }

    .cta-content p {
        font-size: 1rem !important;
    }

    .cta-btn {
        padding: 12px 25px !important;
        font-size: 1rem !important;
    }

    .footer {
        padding: 30px 15px !important;
    }

    .footer-links {
        flex-wrap: wrap !important;
        gap: 15px !important;
    }

    .footer-links a {
        font-size: 0.9rem !important;
    }

    .copyright {
        font-size: 0.8rem !important;
    }
}

/* تحسينات لشاشات صغيرة جداً */
@media (max-width: 360px) {
    .hero-text h1 {
        font-size: 1.8em !important;
    }

    .icon-circle {
        width: 35px !important;
        height: 35px !important;
        font-size: 1.2rem !important;
    }

    .nav-btn {
        padding: 4px 8px !important;
        font-size: 0.7rem !important;
    }

    .problem-card, .solution-item {
        padding: 15px 10px !important;
    }
}

/* تحسين عرض الأيقونات في الجوال */
@media (max-width: 768px) and (orientation: landscape) {
    .hero-content {
        grid-template-columns: 1fr 1fr !important;
        gap: 20px !important;
    }

    .hero-text h1 {
        font-size: 2em !important;
    }

    .food-icons {
        max-width: 300px !important;
    }
}

/* تحسين التطبيق الرئيسي للجوال */
@media (max-width: 768px) {
    .main-app {
        padding: 15px !important;
    }

    .sidebar {
        padding: 20px !important;
    }

    .user-avatar {
        width: 80px !important;
        height: 80px !important;
        font-size: 2em !important;
    }

    .user-name {
        font-size: 1.2em !important;
    }

    .user-points {
        padding: 6px 15px !important;
        font-size: 0.9rem !important;
    }

    .nav-item {
        padding: 12px 15px !important;
        font-size: 0.9rem !important;
    }

    .nav-item i {
        font-size: 1rem !important;
        width: 25px !important;
    }

    .badge {
        margin-left: auto;
        padding: 3px 8px !important;
        font-size: 0.7rem !important;
    }

    .daily-tip {
        padding: 15px !important;
    }

    .daily-tip-title {
        font-size: 0.95rem !important;
    }

    .main-content {
        padding: 20px !important;
    }

    .page-title {
        font-size: 1.8em !important;
    }

    .page-subtitle {
        font-size: 0.95rem !important;
        margin-bottom: 20px !important;
    }

    .stat-card {
        padding: 20px !important;
    }

    .stat-value {
        font-size: 2em !important;
    }

    .food-item {
        padding: 20px !important;
        gap: 15px !important;
    }

    .food-name {
        font-size: 1.2em !important;
    }

    .food-expiry {
        font-size: 0.8rem !important;
        padding: 3px 10px !important;
    }

    .days-left {
        font-size: 0.8rem !important;
        padding: 3px 10px !important;
    }

    .empty-state {
        padding: 40px 20px !important;
    }

    .empty-state h3 {
        font-size: 1.3rem !important;
    }

    .form-group input,
    .form-group select {
        padding: 12px 15px !important;
        font-size: 0.95rem !important;
    }

    .btn-primary, .btn-outline {
        padding: 12px 20px !important;
        font-size: 0.95rem !important;
    }

    .recipe-card {
        padding: 20px !important;
    }

    .recipe-title {
        font-size: 1.3em !important;
    }

    .recipe-points {
        padding: 5px 10px !important;
        font-size: 0.85rem !important;
    }

    .leaderboard-item {
        padding: 15px 20px !important;
        gap: 15px !important;
    }

    .rank {
        width: 40px !important;
        height: 40px !important;
        font-size: 1.1rem !important;
    }

    .leaderboard-name {
        font-size: 1rem !important;
    }

    .leaderboard-points {
        padding: 5px 12px !important;
        font-size: 0.85rem !important;
    }

    /* تحسين المودالات للجوال */
    .auth-container,
    .recipe-modal-content,
    .share-modal-content {
        padding: 25px 20px !important;
        width: 95% !important;
    }

    .auth-tab {
        padding: 10px !important;
        font-size: 0.9rem !important;
    }

    .auth-form input {
        padding: 12px !important;
        font-size: 0.95rem !important;
    }

    .recipe-modal-title {
        font-size: 1.5em !important;
    }

    #modalRecipeIngredients {
        font-size: 0.9rem !important;
    }

    /* تحسين الإشعارات للجوال */
    .notifications-panel {
        top: 15px !important;
        left: 15px !important;
        right: 15px !important;
    }

    .notification {
        min-width: auto !important;
        width: 100% !important;
        padding: 12px 20px !important;
        font-size: 0.9rem !important;
    }
}

/* تحسين خاص لشاشات الجوال الصغيرة جداً */
@media (max-width: 380px) {
    .nav-menu {
        grid-template-columns: 1fr !important;
    }

    .stats-grid {
        grid-template-columns: 1fr !important;
    }

    .user-info {
        flex-direction: column !important;
        text-align: center !important;
    }

    .user-avatar {
        margin: 0 auto 15px !important;
    }

    .food-item {
        flex-direction: column !important;
        text-align: center !important;
        padding-top: 35px !important;
    }

    .status-indicator {
        width: 70px !important;
        height: 4px !important;
        position: absolute !important;
        top: 10px !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
    }

    .days-left {
        position: relative !important;
        top: auto !important;
        right: auto !important;
        margin-top: 10px !important;
        display: inline-block !important;
    }

    .btn-primary, .btn-outline {
        width: 100% !important;
    }

    .form-group {
        margin-bottom: 15px !important;
    }
}

/* تحسين اللمس للأزرار في الجوال */
@media (max-width: 768px) {
    .nav-item, 
    button, 
    .btn-primary, 
    .btn-outline,
    .food-item,
    .recipe-card,
    .progress-dot {
        cursor: default !important;
        -webkit-tap-highlight-color: rgba(46, 125, 50, 0.3) !important;
    }

    .nav-item:active,
    button:active,
    .btn-primary:active,
    .btn-outline:active {
        transform: scale(0.98) !important;
        transition: transform 0.1s !important;
    }
}

/* تحسين التمرير في الجوال */
@media (max-width: 768px) {
    .main-content, .sidebar {
        -webkit-overflow-scrolling: touch !important;
    }

    .items-grid,
    .recipes-grid {
        -webkit-overflow-scrolling: touch !important;
    }
}

/* تحسين إدخال التاريخ في الجوال */
@media (max-width: 768px) {
    input[type="date"] {
        min-height: 45px !important;
    }
}

/* تحسين ظهور لوحة المفاتيح في الجوال */
@media (max-width: 768px) {
    .add-item-form {
        padding-bottom: 20px !important;
    }
}

/* تحسين الشاشة الأفقية في الجوال */
@media (max-width: 896px) and (orientation: landscape) {
    .presentation-section {
        min-height: auto !important;
        padding: 80px 30px !important;
    }

    .hero-content {
        grid-template-columns: 1fr 1fr !important;
    }

    .hero-text h1 {
        font-size: 2.2em !important;
    }

    .problem-cards,
    .solution-grid,
    .steps-container {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .sidebar {
        max-height: 80vh !important;
        overflow-y: auto !important;
    }

    .nav-menu {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

/* تحسينات عامة للجوال */
@media (max-width: 768px) {
    /* منع التحديد العشوائي */
    * {
        -webkit-touch-callout: none !important;
        -webkit-user-select: none !important;
        user-select: none !important;
    }

    /* السماح بالنسخ في حقول الإدخال */
    input, textarea, [contenteditable] {
        -webkit-user-select: auto !important;
        user-select: auto !important;
    }

    /* تحسين التباين */
    .text-muted {
        color: #666 !important;
    }

    /* تحسين المسافات */
    .section-content {
        padding: 0 10px !important;
    }

    /* تحسين ظهور القوائم المنسدلة */
    select {
        background-size: 20px !important;
        padding-left: 35px !important;
    }
}