/* ===== CSS Variables & Design Tokens ===== */
:root {
    /* Primary Colors - Extracted from logo */
    --primary-blue: #06F17B;
    --primary-blue-light: #06F17B;
    --primary-blue-dark: #06F17B;
    --accent-cyan: #06b6d4;
    --accent-cyan-light: #22d3ee;

    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Status Colors */
    --success: #10b981;
    --success-light: #34d399;
    --error: #ef4444;
    --error-light: #f87171;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #06F17B 0%, #06F17B 50%, #06d40d 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(30, 64, 175, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(42, 226, 13, 0.3);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--gradient-overlay), var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.header {
    text-align: center;
    padding: var(--spacing-md) 0;
    animation: fadeInDown var(--transition-slow) ease-out;
}

.brand-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.logo-image {
    height: 56px;
    width: auto;
    filter: drop-shadow(0 4px 6px rgba(30, 64, 175, 0.2));
    transition: transform var(--transition-base);
}

.logo-image:hover {
    transform: scale(1.05) rotate(5deg);
}

.brand-text {
    text-align: left;
}

.brand-name {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.15rem;
    letter-spacing: -1px;
    line-height: 1;
}

.company-tagline {
    color: var(--primary-blue);
    font-size: 0.85rem;
    font-weight: 600;
    font-style: italic;
    letter-spacing: 0.3px;
    margin: 0;
}

.tagline {
    color: var(--gray-600);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) 0;
}

.scanner-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-lg);
    width: 100%;
    max-width: 480px;
    animation: fadeInUp var(--transition-slow) ease-out;
    border: 1px solid var(--gray-200);
}

.card-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.card-header h1 {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.card-header p {
    color: var(--gray-500);
    font-size: 0.9rem;
}

/* ===== Viewfinder (Google Lens style) ===== */
.viewfinder-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.viewfinder {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    background: var(--gray-900);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.viewfinder #video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.viewfinder .preview-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: var(--gray-900);
    z-index: 2;
}

/* ===== Scan Overlay ===== */
.scan-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
    pointer-events: none;
}

.scan-frame {
    width: 65%;
    aspect-ratio: 1 / 1;
    position: relative;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.45);
    border-radius: 4px;
}

/* Corner brackets */
.corner {
    position: absolute;
    width: 28px;
    height: 28px;
}

.corner::before,
.corner::after {
    content: '';
    position: absolute;
    background: var(--accent-cyan-light);
    border-radius: 2px;
}

/* Horizontal bar */
.corner::before {
    height: 4px;
    width: 100%;
}

/* Vertical bar */
.corner::after {
    width: 4px;
    height: 100%;
}

.corner-tl {
    top: -2px;
    left: -2px;
}

.corner-tl::before {
    top: 0;
    left: 0;
}

.corner-tl::after {
    top: 0;
    left: 0;
}

.corner-tr {
    top: -2px;
    right: -2px;
}

.corner-tr::before {
    top: 0;
    right: 0;
}

.corner-tr::after {
    top: 0;
    right: 0;
}

.corner-bl {
    bottom: -2px;
    left: -2px;
}

.corner-bl::before {
    bottom: 0;
    left: 0;
}

.corner-bl::after {
    bottom: 0;
    left: 0;
}

.corner-br {
    bottom: -2px;
    right: -2px;
}

.corner-br::before {
    bottom: 0;
    right: 0;
}

.corner-br::after {
    bottom: 0;
    right: 0;
}

/* Scan line animation */
.scan-line {
    position: absolute;
    left: 17.5%;
    width: 65%;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--accent-cyan-light) 30%, var(--accent-cyan-light) 70%, transparent 100%);
    box-shadow: 0 0 12px var(--accent-cyan-light), 0 0 4px var(--accent-cyan-light);
    animation: scan 2.2s ease-in-out infinite;
}

@keyframes scan {
    0%, 100% {
        top: 17.5%;
        opacity: 1;
    }
    50% {
        top: calc(82.5% - 2px);
        opacity: 0.6;
    }
}

/* ===== Camera Permission Prompt ===== */
.camera-prompt {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: var(--gray-900);
    z-index: 5;
    color: var(--gray-400);
    text-align: center;
}

.camera-prompt p {
    font-size: 0.95rem;
    font-weight: 500;
}

.camera-prompt svg {
    stroke: var(--gray-500);
}

.btn-allow {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-allow:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

/* ===== Upload Button (below viewfinder) ===== */
.btn-upload {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 10px 24px;
    background: var(--white);
    color: var(--gray-700);
    border: 2px solid var(--gray-300);
    border-radius: 50px;
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-upload:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-upload:active {
    transform: translateY(0);
}

.btn-upload svg {
    flex-shrink: 0;
}

/* ===== Result Section ===== */
.result-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--gradient-overlay);
    border-radius: var(--radius-xl);
    animation: scaleIn var(--transition-base) ease-out;
    margin-top: var(--spacing-md);
}

.result-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-sm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s ease-in-out infinite;
}

.result-icon.success {
    background: linear-gradient(135deg, var(--success) 0%, var(--success-light) 100%);
    box-shadow: 0 0 24px rgba(16, 185, 129, 0.4);
}

.result-icon.error {
    background: linear-gradient(135deg, var(--error) 0%, var(--error-light) 100%);
    box-shadow: 0 0 24px rgba(239, 68, 68, 0.4);
}

.result-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--white);
    stroke-width: 3;
}

#resultTitle {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-sm);
}

.result-data {
    background: var(--white);
    padding: var(--spacing-sm);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
    border: 1px solid var(--gray-200);
}

.result-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.result-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-900);
    word-break: break-all;
    padding: var(--spacing-xs);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    font-family: 'Courier New', monospace;
}

/* ===== Buttons ===== */
.btn-primary,
.btn-secondary {
    padding: var(--spacing-xs) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

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

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

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: var(--spacing-sm) 0;
    color: var(--gray-600);
    font-size: 0.85rem;
}

/* ===== Utility Classes ===== */
.hidden {
    display: none !important;
}

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

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

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }

    .scanner-card {
        padding: var(--spacing-md);
    }

    .card-header h1 {
        font-size: 1.25rem;
    }

    .brand-container {
        gap: var(--spacing-sm);
    }

    .logo-image {
        height: 48px;
    }

    .brand-name {
        font-size: 1.75rem;
    }

    .company-tagline {
        font-size: 0.8rem;
    }

    .corner {
        width: 22px;
        height: 22px;
    }
}

@media (max-width: 480px) {
    .card-header h1 {
        font-size: 1.15rem;
    }

    .brand-container {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .logo-image {
        height: 42px;
    }

    .brand-text {
        text-align: center;
    }

    .brand-name {
        font-size: 1.5rem;
    }

    .company-tagline {
        font-size: 0.75rem;
    }

    .btn-upload {
        font-size: 0.85rem;
        padding: 8px 20px;
    }

    .corner {
        width: 18px;
        height: 18px;
    }

    .corner::before {
        height: 3px;
    }

    .corner::after {
        width: 3px;
    }
}