/* ─────────────────────────────────────────────
   🍕 Food Classifier | style.css
   Built by Koyeliya Ghosh | koyelog
───────────────────────────────────────────── */

/* ── Reset & Base ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary:     #ff6b35;
    --primary-dark:#e85d04;
    --primary-light:#f7c59f;
    --secondary:   #2d2d2d;
    --bg:          #fafafa;
    --bg-card:     #ffffff;
    --text:        #1a1a1a;
    --text-muted:  #777;
    --border:      #ebebeb;
    --success:     #22c55e;
    --shadow:      0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg:   0 12px 40px rgba(255,107,53,0.15);
    --radius:      16px;
    --radius-sm:   10px;
    --transition:  all 0.3s ease;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ─────────────────────────────────────────────
   🔝 NAVBAR
───────────────────────────────────────────── */
.navbar {
    position: sticky;
    top: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 60px;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-logo { font-size: 1.6rem; }

.nav-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary);
}

.nav-badge {
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 20px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover { color: var(--primary); }

/* ─────────────────────────────────────────────
   🦸 HERO
───────────────────────────────────────────── */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 80px 60px;
    background: linear-gradient(135deg, #fff5f0 0%, #ffffff 60%, #fff8f0 100%);
    min-height: 90vh;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -100px; right: -100px;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(255,107,53,0.1), transparent 70%);
    border-radius: 50%;
}

.hero-content { max-width: 560px; z-index: 1; }

.hero-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-light), #ffe8dc);
    color: var(--primary-dark);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 30px;
    margin-bottom: 20px;
    border: 1px solid rgba(255,107,53,0.2);
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--text);
    margin-bottom: 16px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), #ff9a56);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 36px;
    padding: 20px 24px;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: fit-content;
}

.stat { text-align: center; }

.stat-num {
    display: block;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-decoration: none;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    transition: var(--transition);
    box-shadow: 0 6px 20px rgba(255,107,53,0.35);
}

.hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(255,107,53,0.45);
}

/* Floating Food Emojis */
.hero-visual { position: relative; width: 420px; height: 420px; }

.food-emojis { position: relative; width: 100%; height: 100%; }

.emoji {
    position: absolute;
    font-size: 3rem;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}

.e1 { top: 10%;  left: 40%;  animation-delay: 0s;    font-size: 3.5rem; }
.e2 { top: 25%;  left: 70%;  animation-delay: 0.8s;  font-size: 2.5rem; }
.e3 { top: 50%;  left: 80%;  animation-delay: 1.6s;  font-size: 3rem; }
.e4 { top: 70%;  left: 60%;  animation-delay: 2.4s;  font-size: 2.8rem; }
.e5 { top: 75%;  left: 20%;  animation-delay: 3.2s;  font-size: 2.5rem; }
.e6 { top: 50%;  left: 5%;   animation-delay: 4s;    font-size: 2.8rem; }
.e7 { top: 20%;  left: 10%;  animation-delay: 4.8s;  font-size: 2.5rem; }
.e8 { top: 5%;   left: 60%;  animation-delay: 1.2s;  font-size: 2rem; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    33%       { transform: translateY(-18px) rotate(5deg); }
    66%       { transform: translateY(-8px) rotate(-3deg); }
}

/* ─────────────────────────────────────────────
   📦 SECTION SHARED
───────────────────────────────────────────── */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* ─────────────────────────────────────────────
   🔍 CLASSIFIER SECTION
───────────────────────────────────────────── */
.classifier-section {
    padding: 80px 60px;
    background: white;
}

.classifier-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 1100px;
    margin: 0 auto;
}

/* Upload Panel */
.upload-panel { display: flex; flex-direction: column; gap: 20px; }

.upload-box {
    border: 3px dashed var(--primary-light);
    border-radius: var(--radius);
    min-height: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    background: #fff9f6;
    position: relative;
    overflow: hidden;
}

.upload-box:hover {
    border-color: var(--primary);
    background: #fff3ed;
    box-shadow: var(--shadow-lg);
}

.upload-box.drag-over {
    border-color: var(--primary);
    background: #ffe8dc;
    transform: scale(1.02);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 40px;
    text-align: center;
}

.upload-icon { font-size: 3.5rem; }

.upload-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
}

.upload-content p { color: var(--text-muted); font-size: 0.9rem; }

.upload-hint {
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 20px;
    margin-top: 6px;
}

#previewImg {
    width: 100%;
    height: 320px;
    object-fit: cover;
    border-radius: calc(var(--radius) - 3px);
    display: block;
}

.change-img {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
}

.change-img button {
    background: rgba(0,0,0,0.65);
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 0.85rem;
    cursor: pointer;
    font-family: 'Poppins', sans-serif;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.change-img button:hover { background: rgba(0,0,0,0.85); }

.classify-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.05rem;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 6px 20px rgba(255,107,53,0.3);
}

.classify-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(255,107,53,0.45);
}

.classify-btn:disabled {
    background: #e0e0e0;
    color: #aaa;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.upload-tips {
    background: #f9f9f9;
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.upload-tips p { margin-bottom: 8px; font-weight: 600; color: var(--text); }

.upload-tips ul { padding-left: 20px; }

.upload-tips li { margin-bottom: 4px; }

/* Results Panel */
.results-panel {
    background: #f9f9f9;
    border-radius: var(--radius);
    min-height: 480px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border);
}

.results-empty, .results-loading {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 40px;
    text-align: center;
    color: var(--text-muted);
}

.empty-icon { font-size: 4rem; opacity: 0.4; }

.results-empty h3 { font-size: 1.1rem; color: var(--text); }

.results-empty p { font-size: 0.9rem; max-width: 220px; }

/* Food Loader */
.food-loader {
    display: flex;
    gap: 10px;
    font-size: 2rem;
    margin-bottom: 10px;
}

.food-loader span {
    animation: bounce 1.2s ease-in-out infinite;
}
.food-loader span:nth-child(1) { animation-delay: 0s; }
.food-loader span:nth-child(2) { animation-delay: 0.2s; }
.food-loader span:nth-child(3) { animation-delay: 0.4s; }

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    40%       { transform: translateY(-16px); }
}

.results-content { padding: 24px; display: flex; flex-direction: column; gap: 18px; }

/* Top Result Card */
.top-result-card {
    background: linear-gradient(135deg, var(--primary), #ff9a56);
    color: white;
    border-radius: var(--radius-sm);
    padding: 20px 24px;
    text-align: center;
}

.top-result-label {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.top-result-score {
    font-size: 0.95rem;
    opacity: 0.9;
    font-weight: 500;
}

.top-result-time {
    font-size: 0.78rem;
    opacity: 0.75;
    margin-top: 4px;
}

/* Info Cards */
.info-cards {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

.info-card {
    background: white;
    border-radius: var(--radius-sm);
    padding: 14px 12px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.info-icon { font-size: 1.5rem; margin-bottom: 4px; }

.info-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.info-value {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.3;
}

/* Predictions Bar Chart */
.predictions-box {
    background: white;
    border-radius: var(--radius-sm);
    padding: 18px;
    border: 1px solid var(--border);
}

.predictions-box h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--text);
}

.pred-item {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.pred-rank {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--primary);
    width: 20px;
    flex-shrink: 0;
}

.pred-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text);
    width: 130px;
    flex-shrink: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pred-bar-wrap {
    flex: 1;
    background: #f0f0f0;
    border-radius: 20px;
    height: 10px;
    overflow: hidden;
}

.pred-bar {
    height: 100%;
    border-radius: 20px;
    transition: width 0.8s ease;
    min-width: 4px;
}

.pred-score {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    width: 42px;
    text-align: right;
    flex-shrink: 0;
}

.try-again-btn {
    width: 100%;
    padding: 12px;
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 700;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.try-again-btn:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

/* ─────────────────────────────────────────────
   🧠 HOW IT WORKS
───────────────────────────────────────────── */
.how-section {
    padding: 80px 60px;
    background: linear-gradient(135deg, #fff5f0, #ffffff);
}

.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    max-width: 1000px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.step-card {
    background: white;
    border-radius: var(--radius);
    padding: 30px 24px;
    text-align: center;
    width: 200px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
}

.step-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.step-num {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 4px 14px;
    border-radius: 20px;
}

.step-icon { font-size: 2.5rem; margin: 10px 0 12px; }

.step-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}

.step-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.step-arrow {
    font-size: 1.8rem;
    color: var(--primary-light);
    font-weight: 700;
    flex-shrink: 0;
}

/* ─────────────────────────────────────────────
   🍱 FOODS SECTION
───────────────────────────────────────────── */
.foods-section {
    padding: 80px 60px;
    background: white;
}

.foods-search {
    max-width: 480px;
    margin: 0 auto 40px;
}

.foods-search input {
    width: 100%;
    padding: 14px 24px;
    border: 2px solid var(--border);
    border-radius: 50px;
    font-size: 0.95rem;
    font-family: 'Poppins', sans-serif;
    outline: none;
    transition: var(--transition);
    background: #fafafa;
    color: var(--text);
}

.foods-search input:focus {
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(255,107,53,0.1);
}

.foods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 14px;
    max-width: 1100px;
    margin: 0 auto;
}

.food-card {
    background: #fff9f6;
    border: 1px solid #ffe8dc;
    border-radius: var(--radius-sm);
    padding: 16px 12px;
    text-align: center;
    transition: var(--transition);
    cursor: default;
}

.food-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(255,107,53,0.12);
    border-color: var(--primary-light);
    background: white;
}

.food-card-emoji { font-size: 1.8rem; display: block; margin-bottom: 6px; }

.food-card-name {
    display: block;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
    line-height: 1.3;
}

.food-card-cal {
    display: block;
    font-size: 0.7rem;
    color: var(--primary);
    font-weight: 600;
}

/* ─────────────────────────────────────────────
   🦶 FOOTER
───────────────────────────────────────────── */
.footer {
    background: var(--secondary);
    color: white;
    padding: 40px 60px;
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-brand span {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary);
}

.footer-brand p {
    font-size: 0.85rem;
    color: #aaa;
    margin-top: 4px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition);
}

.footer-links a:hover { color: var(--primary); }

.footer-info p {
    font-size: 0.78rem;
    color: #666;
    text-align: right;
}

/* ─────────────────────────────────────────────
   📱 RESPONSIVE
───────────────────────────────────────────── */
@media (max-width: 1024px) {
    .navbar { padding: 14px 30px; }
    .hero   { padding: 60px 30px; }
    .classifier-section,
    .how-section,
    .foods-section { padding: 60px 30px; }
    .footer { padding: 30px; }
}

@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 50px 24px;
        min-height: auto;
        gap: 40px;
    }

    .hero-title { font-size: 2.2rem; }

    .hero-stats { margin: 0 auto 30px; }

    .hero-visual { width: 280px; height: 280px; }

    .navbar { padding: 14px 20px; }

    .nav-links { display: none; }

    .classifier-container { grid-template-columns: 1fr; }

    .info-cards { grid-template-columns: 1fr 1fr; }

    .steps-grid { gap: 10px; }

    .step-arrow { display: none; }

    .step-card { width: 160px; padding: 24px 16px; }

    .foods-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }

    .footer-content { flex-direction: column; text-align: center; }

    .footer-info p { text-align: center; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.8rem; }
    .hero-stats { flex-direction: column; gap: 14px; }
    .stat-divider { width: 60px; height: 1px; }
    .info-cards { grid-template-columns: 1fr; }
    .classifier-section,
    .how-section,
    .foods-section { padding: 40px 16px; }
}