/* ==================== CSS Variables ==================== */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252541;
    --bg-card: #1e1e3f;
    --bg-hover: #2a2a4a;

    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --accent-glow: rgba(99, 102, 241, 0.4);

    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* Border Colors */
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(99, 102, 241, 0.5);

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--accent-glow);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Font */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

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

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* ==================== Typography ==================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-secondary);
}

/* ==================== Utilities ==================== */
.hidden {
    display: none !important;
}

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

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

/* ==================== Layout ==================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
}

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

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

.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    border-radius: var(--radius-full);
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* ==================== Form Elements ==================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

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

textarea.form-input {
    min-height: 100px;
    resize: vertical;
}

select.form-input {
    cursor: pointer;
}

/* Password input with toggle */
.input-with-icon {
    position: relative;
}

.input-with-icon .form-input {
    padding-right: 3rem;
}

.input-with-icon .icon-btn {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
}

/* ==================== Auth Screen ==================== */
#auth-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

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

.auth-logo {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.auth-logo svg {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-md);
}

.auth-logo h1 {
    font-size: 1.75rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-logo p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-top: var(--spacing-xs);
}

.auth-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.auth-tabs {
    display: flex;
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    padding: var(--spacing-xs);
}

.auth-tab {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.auth-tab:hover {
    color: var(--text-secondary);
}

.auth-tab.active {
    background: var(--accent-primary);
    color: white;
}

.auth-form .btn {
    width: 100%;
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* ==================== Master Password Screen ==================== */
#master-password-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.master-password-container {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.lock-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.lock-icon svg {
    width: 40px;
    height: 40px;
    color: var(--accent-primary);
}

.master-password-container h2 {
    margin-bottom: var(--spacing-sm);
}

.master-password-container p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
}

/* ==================== Main Screen ==================== */
#main-screen {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 1.25rem;
}

.header-logo svg {
    width: 32px;
    height: 32px;
    color: var(--accent-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Search */
.search-container {
    flex: 1;
    max-width: 400px;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-left: 2.5rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.search-container {
    position: relative;
}

.search-container svg {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    pointer-events: none;
}

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

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-xl) var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* ==================== Password List ==================== */
#password-list {
    display: grid;
    gap: var(--spacing-md);
}

/* Password Card */
.password-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.password-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.card-icon img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.card-info {
    flex: 1;
    min-width: 0;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.card-body {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.password-field {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.password-input {
    flex: 1;
    padding: var(--spacing-sm);
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

/* Strength Bar */
.strength-bar {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

/* Category Badge */
.card-title-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.card-title-row .card-title {
    margin-bottom: 0;
}

.category-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 500;
    color: white;
    border-radius: var(--radius-full);
    white-space: nowrap;
    flex-shrink: 0;
}

/* Notes Section */
.card-notes {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent-primary);
}

.notes-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.notes-content {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
    word-break: break-word;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

.empty-state h3 {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

/* ==================== Modals ==================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    animation: fadeIn var(--transition-fast);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal-content {
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    animation: slideIn var(--transition-normal);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

.modal-header h3 {
    font-size: 1.25rem;
}

.modal-close {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

/* ==================== Password Generator ==================== */
.generator-output {
    margin-bottom: var(--spacing-lg);
}

.generator-password {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.generator-password input {
    flex: 1;
    font-family: 'Fira Code', monospace;
    font-size: 1.1rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    outline: none;
}

.strength-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.strength-indicator .strength-bar {
    flex: 1;
}

#strength-label {
    font-size: 0.875rem;
    font-weight: 500;
}

.generator-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.generator-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.generator-option label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.length-slider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.length-slider input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--bg-tertiary);
    appearance: none;
    cursor: pointer;
}

.length-slider input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
}

.length-value {
    min-width: 2rem;
    text-align: center;
    font-weight: 600;
}

/* Checkbox styling */
input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

/* ==================== Offline Indicator ==================== */
#offline-indicator {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--warning);
    color: #000;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    animation: slideUp var(--transition-normal);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* ==================== Toast Notifications ==================== */
#toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideInRight var(--transition-normal);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.fade-out {
    animation: fadeOut var(--transition-normal) forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(20px);
    }
}

.toast-success {
    border-left: 3px solid var(--success);
}

.toast-error {
    border-left: 3px solid var(--error);
}

.toast-info {
    border-left: 3px solid var(--info);
}

/* ==================== Loading Overlay ==================== */
#loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }

    .header-content {
        flex-wrap: wrap;
    }

    .search-container {
        order: 3;
        max-width: 100%;
        width: 100%;
        margin-top: var(--spacing-sm);
    }

    .main-content {
        padding: var(--spacing-md);
    }

    .modal-content {
        max-height: 100vh;
        border-radius: 0;
    }

    .password-card {
        padding: var(--spacing-md);
    }

    .card-header {
        flex-wrap: wrap;
    }

    .card-actions {
        width: 100%;
        justify-content: flex-end;
        margin-top: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .auth-card {
        padding: var(--spacing-lg);
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}

/* ==================== Scrollbar ==================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}