/* Import Modern Font */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-color: #080b11;
    --card-bg: rgba(15, 23, 42, 0.65);
    --card-border: rgba(255, 255, 255, 0.06);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.25);
    --accent: #d946ef;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    --transition-speed: 0.3s;
}

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

body {
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(217, 70, 239, 0.12) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Header & Nav */
header {
    background: rgba(8, 11, 17, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition-speed);
}

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

.nav-link.active {
    color: var(--primary);
    font-weight: 600;
}

.btn-logout {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-speed);
}

.btn-logout:hover {
    background: var(--danger);
    color: white;
}

/* Main Layout */
main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 2rem;
    animation: fadeIn 0.6s ease-out;
}

/* Glass Card */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.page-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all var(--transition-speed);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* File Upload Area */
.upload-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .upload-grid {
        grid-template-columns: 1fr;
    }
}

.file-dropzone {
    border: 2px dashed rgba(99, 102, 241, 0.25);
    background: rgba(15, 23, 42, 0.4);
    border-radius: 12px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed);
    position: relative;
}

.file-dropzone:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.file-dropzone.dragover {
    border-color: var(--accent);
    background: rgba(217, 70, 239, 0.08);
}

.upload-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
    transition: transform var(--transition-speed);
}

.file-dropzone:hover .upload-icon {
    transform: translateY(-5px);
}

.upload-text {
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.upload-subtext {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-status {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--success);
    font-weight: 600;
    display: none;
}

/* Date picker customization */
input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.85rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
    box-shadow: 0 4px 12px var(--primary-glow);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

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

.btn-primary:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Secondary Button (Downloads) */
.download-group {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn-download {
    flex: 1;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    transition: all var(--transition-speed);
}

.btn-download.csv {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--primary);
}

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

.btn-download.xlsx {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.btn-download.xlsx:hover {
    background: var(--success);
    color: white;
}

/* Processing Summary Grid */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.summary-card {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.25rem;
    transition: transform var(--transition-speed);
}

.summary-card:hover {
    transform: translateY(-3px);
    border-color: rgba(99, 102, 241, 0.2);
}

.summary-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.summary-value {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.summary-card.highlight {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(217, 70, 239, 0.15));
    border-color: rgba(99, 102, 241, 0.3);
}

.summary-card.highlight .summary-value {
    background: linear-gradient(135deg, #a5b4fc, #f472b6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.summary-card.warning {
    border-color: rgba(245, 158, 11, 0.3);
    background: rgba(245, 158, 11, 0.05);
}

.summary-card.warning .summary-value {
    color: var(--warning);
}

/* Preview Table */
.table-container {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.5);
    margin-top: 1.5rem;
    max-height: 450px;
    overflow-y: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

th {
    background: #0f172a;
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 10;
}

td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--card-border);
    color: var(--text-secondary);
}

tr:hover td {
    background: rgba(99, 102, 241, 0.04);
    color: var(--text-primary);
}

/* Status Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge.guid-ok {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.badge.guid-missing {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

.badge.collector-ok {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary);
}

.badge.collector-missing {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
}

.badge.review-note {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
    font-size: 0.8rem;
    text-transform: none;
    font-weight: 500;
}

/* Login Page Spec */
.login-wrapper {
    max-width: 420px;
    width: 100%;
    margin: 6rem auto;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    font-weight: 500;
}

.alert.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

/* History Layout */
.history-table {
    font-size: 0.9rem;
}

.history-action-links {
    display: flex;
    gap: 0.75rem;
}

.history-action-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-speed);
}

.history-action-link:hover {
    color: var(--accent);
}

/* Spinner */
.spinner-container {
    display: none;
    flex-direction: column;
    align-items: center;
    margin: 2rem 0;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(99, 102, 241, 0.1);
    border-left-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--card-border);
    margin-top: auto;
}