/* ============================================================
   PayTR POS Tahsilat Sistemi – Premium Design System
   ============================================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.85);
    --bg-card-border: rgba(99, 102, 241, 0.15);
    --bg-input: rgba(15, 23, 42, 0.7);
    --bg-input-focus: rgba(30, 41, 59, 0.8);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-label: #cbd5e1;

    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-dark: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.35);

    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --pending: #6366f1;
    --pending-bg: rgba(99, 102, 241, 0.1);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 14px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 30px var(--accent-glow);

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

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

/* --- Animated Background --- */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    pointer-events: none;
}

.glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
    z-index: 0;
    pointer-events: none;
    animation: glowFloat 12s ease-in-out infinite;
}

.glow-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.3), transparent 70%);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.glow-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.25), transparent 70%);
    bottom: -80px;
    left: -80px;
    animation-delay: -4s;
}

.glow-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.2), transparent 70%);
    top: 40%;
    left: 50%;
    animation-delay: -8s;
}

@keyframes glowFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* --- Header --- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 14, 26, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.1rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 0 20px var(--accent-glow);
}

.nav {
    display: flex;
    gap: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.1);
}

.nav-link.active {
    color: white;
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

/* --- Main Container --- */
.main {
    position: relative;
    z-index: 1;
    max-width: 640px;
    margin: 0 auto;
    padding: 40px 20px 60px;
}

.main.wide {
    max-width: 1200px;
}

/* --- Steps --- */
.step {
    display: none;
    animation: fadeSlideUp 0.5s ease;
}

.step.active {
    display: block;
}

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

/* --- Card --- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: 32px 32px 0;
    text-align: center;
}

.card-header h1,
.card-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 12px;
    color: var(--text-primary);
}

.card-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 4px;
}

.card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-glow);
}

/* --- Form --- */
.form {
    padding: 24px 32px 32px;
}

.form-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 24px 0 20px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.form-divider::before,
.form-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.2), transparent);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group.full-width {
    grid-column: 1 / -1;
    margin-top: 4px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-label);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-group label svg {
    color: var(--accent-light);
    opacity: 0.7;
}

.optional {
    font-weight: 400;
    text-transform: none;
    color: var(--text-muted);
    letter-spacing: 0;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid rgba(99, 102, 241, 0.12);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: var(--transition);
    outline: none;
}

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

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

.form-group input.error {
    border-color: var(--error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

/* --- Amount Section --- */
.amount-section {
    text-align: center;
    padding: 8px 0 0;
}

.amount-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
    display: block;
}

.amount-input-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
    max-width: 320px;
    width: 100%;
}

.amount-currency {
    position: absolute;
    left: 20px;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-light);
    pointer-events: none;
    z-index: 2;
}

.amount-input {
    width: 100%;
    padding: 20px 20px 20px 52px !important;
    font-size: 2.5rem !important;
    font-weight: 700 !important;
    text-align: center;
    background: var(--bg-input) !important;
    border: 2px solid rgba(99, 102, 241, 0.15) !important;
    border-radius: var(--radius-lg) !important;
    color: var(--text-primary) !important;
    font-family: var(--font) !important;
    outline: none;
    transition: var(--transition);
    letter-spacing: -0.02em;
}

.amount-input:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 4px var(--accent-glow), var(--shadow-glow) !important;
    background: var(--bg-input-focus) !important;
}

.amount-input::placeholder {
    color: var(--text-muted) !important;
    font-weight: 400 !important;
    font-size: 2rem !important;
}

/* --- Alert --- */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    margin: 16px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-error {
    background: var(--error-bg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.alert-success {
    background: var(--success-bg);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #6ee7b7;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    color: white;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

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

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

.btn-lg {
    width: 100%;
    padding: 16px 32px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
    margin-top: 24px;
}

.btn-loader {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

.btn-back {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}

.btn-back:hover {
    background: rgba(99, 102, 241, 0.2);
    color: var(--text-primary);
}

/* --- Security Badges --- */
.security-badges {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.badge {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: rgba(99, 102, 241, 0.06);
    border: 1px solid rgba(99, 102, 241, 0.08);
}

/* --- iFrame Card --- */
.iframe-card .card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    text-align: left;
    padding: 24px 28px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
}

.iframe-card .card-header h2 {
    margin-top: 0;
    font-size: 1.15rem;
}

.iframe-container {
    min-height: 400px;
    padding: 0;
}

.iframe-container iframe {
    display: block;
    width: 100%;
    min-height: 400px;
    border: none;
}

/* --- Footer --- */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid rgba(99, 102, 241, 0.06);
}

/* ============================================================
   Result Page
   ============================================================ */
.result-card {
    text-align: center;
    padding: 48px 32px;
}

.result-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.result-icon.success {
    background: var(--success-bg);
    border: 2px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
    animation: popIn 0.5s ease;
}

.result-icon.failed {
    background: var(--error-bg);
    border: 2px solid rgba(239, 68, 68, 0.3);
    color: var(--error);
    animation: popIn 0.5s ease;
}

.result-icon.pending {
    background: var(--pending-bg);
    border: 2px solid rgba(99, 102, 241, 0.3);
    color: var(--pending);
}

@keyframes popIn {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.15); }
    100% { transform: scale(1); opacity: 1; }
}

.result-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.result-message {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 32px;
}

.result-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--accent-light);
}

.btn-outline:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--accent);
}

/* ============================================================
   History Page
   ============================================================ */
.history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    gap: 16px;
    flex-wrap: wrap;
}

.history-header h1 {
    font-size: 1.6rem;
    font-weight: 700;
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--bg-card-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    backdrop-filter: blur(16px);
    transition: var(--transition);
}

.stat-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 6px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-value.success { color: var(--success); }
.stat-value.error { color: var(--error); }
.stat-value.pending { color: var(--warning); }

/* --- Filter Bar --- */
.filter-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-bar select,
.filter-bar input {
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid rgba(99, 102, 241, 0.12);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.875rem;
    outline: none;
    transition: var(--transition);
    min-width: 160px;
}

.filter-bar select:focus,
.filter-bar input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.filter-bar select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* --- Table --- */
.table-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

thead {
    background: rgba(99, 102, 241, 0.08);
    border-bottom: 1px solid rgba(99, 102, 241, 0.15);
}

th {
    padding: 14px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    white-space: nowrap;
}

td {
    padding: 14px 16px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.06);
    color: var(--text-secondary);
    white-space: nowrap;
}

tr:hover td {
    background: rgba(99, 102, 241, 0.04);
}

.td-amount {
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.status-badge.success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-badge.failed {
    background: var(--error-bg);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.status-badge.pending {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.status-badge.cancelled {
    background: rgba(100, 116, 139, 0.1);
    color: var(--text-muted);
    border: 1px solid rgba(100, 116, 139, 0.2);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

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

.empty-state svg {
    margin-bottom: 16px;
    opacity: 0.3;
}

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

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 20px;
    padding: 16px;
}

.page-btn {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.12);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.page-btn:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--text-primary);
}

.page-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.page-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* --- Detail Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--bg-card-border);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 480px;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.95) translateY(20px);
    transition: var(--transition);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--error);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    background: rgba(239, 68, 68, 0.2);
}

.modal-body {
    padding: 24px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 10px 0;
    gap: 16px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.06);
}

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

.detail-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    flex-shrink: 0;
}

.detail-value {
    font-size: 0.9rem;
    color: var(--text-primary);
    text-align: right;
    word-break: break-all;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .header-inner {
        padding: 0 16px;
    }
    
    .logo span {
        display: none;
    }
    
    .main {
        padding: 24px 16px 40px;
    }
    
    .form {
        padding: 20px;
    }
    
    .card-header {
        padding: 24px 20px 0;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .amount-input {
        font-size: 2rem !important;
        padding: 16px 16px 16px 44px !important;
    }
    
    .amount-currency {
        font-size: 1.5rem;
        left: 16px;
    }
    
    .stats-row {
        grid-template-columns: 1fr 1fr;
    }
    
    .filter-bar {
        flex-direction: column;
    }
    
    .filter-bar select,
    .filter-bar input {
        min-width: auto;
        width: 100%;
    }
    
    .history-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .stats-row {
        grid-template-columns: 1fr;
    }
    
    .nav-link span {
        display: none;
    }
}

/* --- Utility --- */
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--text-muted); }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }