:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #475569;
    --background-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --success-color: #16a34a;
    --danger-color: #dc2626;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --radius: 0.5rem;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
    padding: 2rem 1rem;
}

/* ── Auth Pages (Login, Setup) ─────────────────────────── */

.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1rem;
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    padding: 0;
    overflow: hidden;
}

.auth-header {
    padding: 2rem 2rem 1rem;
    text-align: center;
}

.auth-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.auth-header h1 i {
    color: var(--primary-color);
}

.auth-header p {
    color: var(--text-light);
    font-size: 0.95rem;
}

.auth-form {
    padding: 1rem 2rem 2rem;
}

.setup-step {
    margin-bottom: 1.5rem;
}

.step-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    margin-bottom: 0.5rem;
}

.setup-step h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.qr-section {
    text-align: center;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: #f8fafc;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.qr-section p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.qr-code-container {
    display: inline-block;
    padding: 1rem;
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.secret-details {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-light);
}

.secret-details summary {
    cursor: pointer;
    user-select: none;
}

.secret-code {
    display: block;
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: white;
    border-radius: var(--radius);
    font-size: 1rem;
    letter-spacing: 0.15em;
    font-weight: 600;
    color: var(--text-color);
    word-break: break-all;
}

.alert {
    margin: 0 2rem 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-error {
    background: #fef2f2;
    color: var(--danger-color);
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: var(--success-color);
    border: 1px solid #bbf7d0;
}

.btn-full {
    width: 100%;
    margin-top: 0.5rem;
}

/* ── App Container ─────────────────────────────────────── */

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* ── Header ────────────────────────────────────────────── */

.app-header {
    margin-bottom: 2rem;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.header-text {
    text-align: left;
}

.app-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.app-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-logout {
    padding: 0.75rem;
}

/* ── Base UI ───────────────────────────────────────────── */

.card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    border: none;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
    transition: transform 0.1s, background-color 0.2s, box-shadow 0.2s;
    text-decoration: none;
    font-family: inherit;
}

.btn:active {
    transform: translateY(1px);
}

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

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

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #334155;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius);
    transition: background-color 0.2s, color 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background-color: #f1f5f9;
    color: var(--text-color);
}

.delete-btn:hover {
    color: var(--danger-color);
    background-color: #fee2e2;
}

.edit-btn:hover {
    color: var(--primary-color);
    background-color: #dbeafe;
}

/* ── Forms ─────────────────────────────────────────────── */

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.form-group label i {
    color: var(--text-light);
    font-size: 0.8rem;
}

.form-text {
    font-size: 0.75rem;
    color: var(--text-light);
}

input[type="text"],
input[type="url"],
input[type="password"],
select {
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
    font-family: inherit;
}

input[type="text"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-with-button {
    display: flex;
    gap: 0.5rem;
}

.input-with-button input,
.input-with-button select {
    flex-grow: 1;
}

/* ── Search Box ────────────────────────────────────────── */

.search-box {
    display: flex;
    align-items: center;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    gap: 0.5rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-box i {
    color: var(--text-light);
}

.search-box input {
    border: none;
    padding: 0.25rem 0;
    box-shadow: none;
    width: 250px;
    outline: none;
    font-size: 0.95rem;
}

.search-box input:focus {
    box-shadow: none;
}

/* ── Modal ─────────────────────────────────────────────── */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(2px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.2s;
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    width: 90%;
    max-width: 500px;
    padding: 0;
    overflow: hidden;
    transform: translateY(0);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal.hidden .modal-content {
    transform: translateY(-20px);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-bg);
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
}

.modal-body {
    padding: 1.5rem;
    background-color: var(--card-bg);
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: #f8fafc;
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* ── Categories & Tiles ────────────────────────────────── */

.category-section {
    margin-bottom: 3rem;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.category-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.category-header h3 i {
    color: var(--primary-color);
}

.category-actions {
    display: flex;
    gap: 0.25rem;
}

.category-actions .btn-icon {
    font-size: 0.85rem;
    padding: 0.35rem 0.5rem;
    opacity: 0.4;
    transition: opacity 0.2s, background-color 0.2s, color 0.2s;
}

.category-actions .btn-icon:hover {
    opacity: 1;
    color: var(--primary-color);
    background-color: #dbeafe;
}

.category-actions .btn-icon:disabled {
    opacity: 0.15;
    cursor: default;
    pointer-events: none;
}

.tiles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.5rem;
    min-height: 100px;
}

/* ── Tile ──────────────────────────────────────────────── */

.tile {
    position: relative;
    padding: 0;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    cursor: grab;
    display: flex;
    flex-direction: column;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
}

.tile:active {
    cursor: grabbing;
}

.tile:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #cbd5e1;
}

.tile-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 10;
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius);
    padding: 0.25rem;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(4px);
}

.tile:hover .tile-actions {
    opacity: 1;
}

.tile-content {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tile-image-container {
    height: 130px;
    background-color: #f1f5f9;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.tile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.tile:hover .tile-image {
    transform: scale(1.05);
}

.tile-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
}

.tile-image-overlay i {
    color: white;
    font-size: 2rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    transform: translateY(10px);
    transition: transform 0.2s;
}

.tile:hover .tile-image-overlay {
    opacity: 1;
}

.tile:hover .tile-image-overlay i {
    transform: translateY(0);
}

.tile-info {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex-grow: 1;
}

.tile-title {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tile-url {
    font-size: 0.8rem;
    color: var(--text-light);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── Drag & Drop ───────────────────────────────────────── */

.tile.dragging {
    opacity: 0.4;
    transform: scale(0.95);
    box-shadow: none;
}

.tile.drag-over {
    border: 2px dashed var(--primary-color);
    background-color: #eff6ff;
}

.tiles-grid.drag-over {
    background-color: #f8fafc;
    border-radius: var(--radius);
}

/* ── Responsive ────────────────────────────────────────── */

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .header-text {
        text-align: center;
    }

    .header-actions {
        width: 100%;
        flex-direction: column-reverse;
    }

    .search-box {
        width: 100%;
    }

    .search-box input {
        width: 100% !important;
    }

    .auth-form {
        padding: 1rem 1.5rem 1.5rem;
    }

    .alert {
        margin: 0 1.5rem 0.5rem;
    }

    .auth-header {
        padding: 1.5rem 1.5rem 0.75rem;
    }
}