/* ============================================================
   styles.css — Visiting Card Scanner — Premium Dark Theme
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ---- CSS Custom Properties ---- */
:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(30, 30, 55, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.04);
    --bg-input: rgba(255, 255, 255, 0.06);

    --text-primary: #e8e8f0;
    --text-secondary: #9898b0;
    --text-muted: #6a6a88;

    --accent: #6c63ff;
    --accent-hover: #7b73ff;
    --accent-glow: rgba(108, 99, 255, 0.3);
    --gradient-primary: linear-gradient(135deg, #6c63ff 0%, #e363ff 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(108, 99, 255, 0.15) 0%, rgba(227, 99, 255, 0.08) 100%);

    --success: #2dd4a8;
    --error: #ff6b6b;
    --warning: #ffb347;

    --border: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(108, 99, 255, 0.5);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px var(--accent-glow);

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 20%, rgba(108, 99, 255, 0.06) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(227, 99, 255, 0.04) 0%, transparent 50%);
    z-index: -1;
    animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-2%, 2%); }
}

/* ---- Auth Overlay ---- */
.auth-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.auth-overlay.fade-out {
    opacity: 0;
}

.auth-overlay.hidden {
    display: none;
}

.auth-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 3rem;
    width: 90%;
    max-width: 400px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.auth-card .logo {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.8rem;
}

.auth-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

.auth-input-group {
    position: relative;
    margin-bottom: 1rem;
}

.auth-input-group input {
    width: 100%;
    padding: 0.9rem 1.2rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.auth-input-group input:focus {
    border-color: var(--border-focus);
    box-shadow: var(--shadow-glow);
}

.auth-error {
    color: var(--error);
    font-size: 0.85rem;
    min-height: 1.2em;
    margin-bottom: 1rem;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-input);
    border-color: var(--border-focus);
}

.btn-success {
    background: linear-gradient(135deg, #2dd4a8 0%, #28b896 100%);
    color: #0a1a14;
}

.btn-success:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 0 20px rgba(45, 212, 168, 0.3);
}

.btn-success:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-glass);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(108, 99, 255, 0.1);
}

.btn-icon.btn-danger:hover {
    color: var(--error);
    border-color: var(--error);
    background: rgba(255, 107, 107, 0.1);
}

.btn-full {
    width: 100%;
}

/* ---- Layout ---- */
.hidden {
    display: none !important;
}

.app-header {
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 26, 0.85);
}

.app-header .brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.app-header .brand-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.app-header .brand-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-header .brand-sub {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 400;
    display: block;
    background: none;
    -webkit-text-fill-color: var(--text-muted);
}

.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

/* ---- Section Cards ---- */
.section {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.section:hover {
    border-color: rgba(108, 99, 255, 0.15);
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.section-title svg {
    color: var(--accent);
}

/* ---- Drop Zone ---- */
.drop-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent);
    background: var(--gradient-subtle);
}

.drop-zone.has-image {
    padding: 1rem;
}

.drop-zone-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.drop-zone-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.drop-zone-text strong {
    color: var(--accent);
}

.upload-buttons {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---- Preview ---- */
.preview-container {
    margin-top: 1rem;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-secondary);
}

.preview-container img {
    width: 100%;
    max-height: 300px;
    object-fit: contain;
    display: block;
}

.clear-preview {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
}

.clear-preview:hover {
    background: var(--error);
}

/* ---- Progress ---- */
.ocr-progress {
    margin-top: 1.5rem;
}

.progress-bar-container {
    background: var(--bg-input);
    border-radius: 100px;
    height: 8px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 100px;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

/* ---- Raw Text ---- */
.raw-text-output {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border);
}

/* ---- Contact Form ---- */
.contact-form {
    margin-top: 1.5rem;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea {
    padding: 0.7rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* ---- Saved Cards ---- */
.cards-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.sync-controls {
    display: flex;
    gap: 0.5rem;
}

.btn-icon-text {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon-text:hover {
    background: rgba(108, 99, 255, 0.1);
    color: var(--accent);
    border-color: var(--accent);
}

.cards-search-header {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.search-input {
    flex: 1;
    min-width: 200px;
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236a6a88' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 0.75rem center;
}

.search-input:focus {
    border-color: var(--border-focus);
}

.cards-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.card-item {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    transition: var(--transition);
    animation: fadeInUp 0.3s ease forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.card-item:hover {
    border-color: rgba(108, 99, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-item-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.card-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: white;
    flex-shrink: 0;
}

.card-info {
    flex: 1;
    min-width: 0;
}

.card-name {
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-business {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.card-detail {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.card-notes {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 0.75rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.empty-state p {
    font-size: 0.95rem;
}

/* ---- Toast ---- */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(120%);
    padding: 0.9rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 9999;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    white-space: nowrap;
    max-width: 90%;
    box-shadow: var(--shadow-lg);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: linear-gradient(135deg, #1a3a2e, #1a2e3a);
    color: var(--success);
    border: 1px solid rgba(45, 212, 168, 0.2);
}

.toast.error {
    background: linear-gradient(135deg, #3a1a1a, #3a1a2e);
    color: var(--error);
    border: 1px solid rgba(255, 107, 107, 0.2);
}

/* ---- Spinner ---- */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.6s linear infinite;
}

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

/* ---- Footer ---- */
.app-footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

.app-footer a {
    color: var(--accent);
    text-decoration: none;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}

/* ============================================================
   RESPONSIVE BREAKPOINTS
   ============================================================ */

/* Tablet (640px - 1024px) */
@media (min-width: 640px) {
    .form-grid {
        grid-template-columns: 1fr 1fr;
    }

    .form-grid .form-group:nth-child(7),
    .form-grid .form-group:nth-child(8) {
        grid-column: 1 / -1;
    }

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

    .upload-buttons {
        gap: 1rem;
    }
}

/* Laptop / Desktop (1024px+) */
@media (min-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .section-upload {
        grid-column: 1;
        grid-row: 1;
    }

    .section-cards {
        grid-column: 2;
        grid-row: 1 / span 2;
        position: sticky;
        top: 80px;
        max-height: calc(100vh - 100px);
        overflow-y: auto;
    }

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

    .form-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Large Desktop (1400px+) */
@media (min-width: 1400px) {
    .cards-container {
        grid-template-columns: 1fr 1fr;
    }
}

/* Mobile adjustments */
@media (max-width: 639px) {
    .app-header {
        padding: 1rem;
    }

    .app-header .brand-text {
        font-size: 1rem;
    }

    .main-content {
        padding: 1rem;
    }

    .section {
        padding: 1.25rem;
    }

    .auth-card {
        padding: 2rem 1.5rem;
    }

    .drop-zone {
        padding: 2rem 1rem;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }

    .cards-header {
        flex-direction: column;
        align-items: stretch;
    }
}