:root {
    --bg: #09090b;
    --border: #27272a;
    --border-hover: #3f3f46;
    --text: #ffffff;
    --text-muted: #71717a;
    --success: #10b981;
    --error: #ef4444;
    --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 13px;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}
::-webkit-scrollbar-track {
    background: var(--bg);
}
::-webkit-scrollbar-thumb {
    background: var(--border);
}

/* Header Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    max-width: 900px;
    margin: 0 auto;
}

.brand-name {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    gap: 1rem;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    transition: color 0.15s ease;
}

.nav-btn:hover, .nav-btn.active {
    color: var(--text);
}

.user-badge {
    font-size: 0.8rem;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 0.25rem 0.5rem;
}

/* Main Container */
.main-content {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1.5rem 4rem 1.5rem;
}

.page-view {
    display: none;
}

.page-view.active {
    display: block;
}

/* Form controls */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.form-input, .form-select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: inherit;
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.15s ease;
}

.form-input:focus, .form-select:focus {
    border-color: var(--border-hover);
}

/* Grid Store */
.store-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .store-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.section-title {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

/* Currencies */
.currency-selector {
    display: flex;
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.currency-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.4rem;
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
}

.currency-btn.selected {
    background: var(--border);
    color: var(--text);
}

/* Durations */
.duration-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.duration-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: border-color 0.15s ease;
}

.duration-row:hover {
    border-color: var(--border-hover);
}

.duration-row.selected {
    border-color: var(--text);
    background: rgba(255, 255, 255, 0.02);
}

.duration-name {
    font-weight: 600;
}

.duration-cost {
    font-weight: 700;
}

/* Flat Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.65rem 1.25rem;
    background: var(--text);
    color: var(--bg);
    border: 1px solid var(--text);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    transition: background-color 0.15s ease, color 0.15s ease;
}

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

.btn-secondary {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}

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

.btn-danger {
    background: transparent;
    border-color: var(--error);
    color: var(--error);
}

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

.btn-success {
    background: transparent;
    border-color: var(--success);
    color: var(--success);
}

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

/* Cabinet Dashboard */
.cabinet-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 3rem;
}

@media (max-width: 768px) {
    .cabinet-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.auth-box {
    max-width: 320px;
    margin: 4rem auto;
    border: 1px solid var(--border);
    padding: 1.5rem;
}

.auth-header-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.auth-tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.5rem;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    border-bottom: 2px solid transparent;
}

.auth-tab-btn.active {
    color: var(--text);
    border-bottom-color: var(--text);
}

.expiry-badge {
    border: 1px solid var(--border);
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.badge-green {
    color: var(--success);
    font-weight: 700;
}

.badge-red {
    color: var(--error);
    font-weight: 700;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-window {
    background: var(--bg);
    border: 1px solid var(--border);
    width: 90%;
    max-width: 400px;
}

.modal-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
}

.modal-close:hover {
    color: var(--text);
}

.modal-body {
    padding: 1.5rem 1rem;
}

.modal-footer {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* Admin Dashboard */
.admin-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2.5rem;
}

@media (max-width: 768px) {
    .admin-layout {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

.admin-menu {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.admin-menu-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.5rem;
    text-align: left;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    transition: color 0.15s ease;
}

.admin-menu-btn:hover, .admin-menu-btn.active {
    color: var(--text);
}

.admin-tab-view {
    display: none;
}

.admin-tab-view.active {
    display: block;
}

/* Tables */
.data-table-container {
    border: 1px solid var(--border);
    overflow-x: auto;
    margin-top: 1rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.data-table th, .data-table td {
    padding: 0.6rem 0.8rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background: rgba(255, 255, 255, 0.01);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
}

/* File Upload drag box */
.file-upload-box {
    border: 1px dashed var(--border);
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.01);
}

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

.file-upload-input {
    display: none;
}

/* Toasts */
.toast-container {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.toast {
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.65rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 280px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    animation: slideDown 0.15s ease;
}

.toast.success {
    border-left: 2px solid var(--success);
}

.toast.error {
    border-left: 2px solid var(--error);
}

.toast.info {
    border-left: 2px solid var(--border-hover);
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}