/* Kronos Proof of Existence - Styles */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.1);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --border: #2a2a3a;
    --border-hover: #3a3a4a;
    --radius: 12px;
    --radius-sm: 8px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.05em;
}

.logo-icon {
    color: var(--accent);
    font-size: 1.5rem;
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-link.active {
    color: var(--text-primary);
    background: var(--accent);
}

/* Main */
.main {
    flex: 1;
    padding: 48px 0;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* Hero */
.hero {
    text-align: center;
    margin-bottom: 48px;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 60px 40px;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    background: var(--bg-secondary);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.05);
}

.upload-zone.dragover {
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.upload-zone h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.upload-zone p {
    color: var(--text-secondary);
}

.file-label {
    color: var(--accent);
    cursor: pointer;
    text-decoration: underline;
}

.file-label:hover {
    color: var(--accent-hover);
}

.upload-note {
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* File Preview */
.file-preview {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.file-info {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.file-icon {
    font-size: 2rem;
}

.file-details {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.file-name {
    font-weight: 600;
    word-break: break-all;
}

.file-size {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.btn-clear {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.btn-clear:hover {
    color: var(--error);
    background: var(--error-bg);
}

.hash-display {
    margin-bottom: 20px;
}

.hash-display label,
.label-input label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.hash-display code {
    display: block;
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    word-break: break-all;
    color: var(--accent);
}

.label-input {
    margin-bottom: 24px;
}

.label-input input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: border-color 0.2s;
}

.label-input input:focus {
    outline: none;
    border-color: var(--accent);
}

.label-input input::placeholder {
    color: var(--text-muted);
}

/* Buttons */
.btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-cost {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

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

.btn-text-only {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 12px;
    transition: color 0.2s;
}

.btn-text-only:hover {
    color: var(--text-primary);
}

/* Proof Result */
.proof-result {
    background: var(--bg-secondary);
    border: 1px solid var(--success);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
}

.success-badge {
    display: inline-block;
    background: var(--success-bg);
    color: var(--success);
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600;
    margin-bottom: 24px;
}

.proof-details {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 20px;
    margin-bottom: 24px;
    text-align: left;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.detail-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-align: right;
    word-break: break-all;
    margin-left: 20px;
}

.detail-value.hash {
    color: var(--accent);
    font-size: 0.75rem;
}

.proof-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 16px;
}

/* Verify Tab */
.or-divider {
    text-align: center;
    margin: 32px 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.or-divider span {
    background: var(--bg-primary);
    padding: 0 16px;
    position: relative;
}

.or-divider::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    height: 1px;
    background: var(--border);
    z-index: -1;
}

.hash-input-group {
    display: flex;
    gap: 12px;
}

.hash-input-group input {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.hash-input-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.hash-input-group input::placeholder {
    color: var(--text-muted);
    font-family: var(--font-sans);
}

.hash-input-group .btn-primary {
    width: auto;
    flex-shrink: 0;
}

/* Verify Result */
.verify-result {
    margin-top: 32px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 24px;
}

.verify-status {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.verify-status.found {
    color: var(--success);
}

.verify-status.not-found {
    color: var(--error);
}

/* My Proofs */
.user-id-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 32px;
}

.user-id-section label {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.user-id-input-group {
    display: flex;
    gap: 12px;
}

.user-id-input-group input {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 1rem;
}

.user-id-input-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.user-id-input-group .btn-primary {
    width: auto;
}

.hint {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.proofs-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.proof-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: border-color 0.2s;
}

.proof-card:hover {
    border-color: var(--border-hover);
}

.proof-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.proof-card-label {
    font-weight: 600;
}

.proof-card-position {
    color: var(--accent);
    font-size: 0.85rem;
}

.proof-card-hash {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    word-break: break-all;
    margin-bottom: 12px;
}

.proof-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

/* Footer */
.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
}

.weave-status {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.weave-position {
    font-family: var(--font-mono);
    color: var(--accent);
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 24px;
    font-size: 0.9rem;
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    border-color: var(--success);
    background: var(--success-bg);
    color: var(--success);
}

.toast.error {
    border-color: var(--error);
    background: var(--error-bg);
    color: var(--error);
}

/* Loading State */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Responsive */
@media (max-width: 600px) {
    .header {
        flex-direction: column;
        gap: 16px;
    }

    .nav {
        width: 100%;
        justify-content: center;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .upload-zone {
        padding: 40px 20px;
    }

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

    .hash-input-group {
        flex-direction: column;
    }

    .user-id-input-group {
        flex-direction: column;
    }

    .footer {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}