/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */

:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: #e0e7ff;
    --color-secondary: #f59e0b;
    --color-secondary-hover: #d97706;
    --color-success: #10b981;
    --color-error: #ef4444;

    /* Neutrals */
    --color-bg: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-bg-tertiary: #f3f4f6;
    --color-text: #111827;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;
    --color-border: #e5e7eb;
    --color-border-hover: #d1d5db;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Border radius */
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition: 200ms ease;
    --transition-slow: 300ms ease;

    /* Layout */
    --max-width: 640px;
    --header-height: 64px;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #818cf8;
        --color-primary-hover: #6366f1;
        --color-primary-light: #312e81;
        --color-secondary: #fbbf24;
        --color-secondary-hover: #f59e0b;

        --color-bg: #111827;
        --color-bg-secondary: #1f2937;
        --color-bg-tertiary: #374151;
        --color-text: #f9fafb;
        --color-text-secondary: #d1d5db;
        --color-text-muted: #9ca3af;
        --color-border: #374151;
        --color-border-hover: #4b5563;

        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
        --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.4), 0 1px 2px -1px rgb(0 0 0 / 0.4);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
        --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    }
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

*, *::before, *::after {
    box-sizing: border-box;
}

* {
    margin: 0;
}

html {
    height: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100%;
    -webkit-font-smoothing: antialiased;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

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

a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Layout
   ========================================================================== */

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 var(--space-4);
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--color-text);
    text-decoration: none;
}

.header__logo:hover {
    text-decoration: none;
    color: var(--color-primary);
}

.header__icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.main {
    flex: 1;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-6) var(--space-4);
}

.footer {
    padding: var(--space-6) var(--space-4);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Typography
   ========================================================================== */

.title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

.subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
}

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

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

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

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

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

.btn--outline {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

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

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

.btn--danger:hover:not(:disabled) {
    background-color: #dc2626;
}

.btn--small {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
}

.btn--large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
}

.btn--full {
    width: 100%;
}

.btn--icon {
    padding: var(--space-2);
    border-radius: var(--radius);
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background-color: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

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

.form-input--error {
    border-color: var(--color-error);
}

.form-error {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--space-1);
}

.form-hint {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--space-1);
}

/* Toggle switch */
.toggle {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
}

.toggle__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle__slider {
    position: relative;
    width: 48px;
    height: 26px;
    background-color: var(--color-border);
    border-radius: var(--radius-full);
    transition: background-color var(--transition-fast);
}

.toggle__slider::before {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    background-color: white;
    border-radius: 50%;
    transition: transform var(--transition-fast);
}

.toggle__input:checked + .toggle__slider {
    background-color: var(--color-primary);
}

.toggle__input:checked + .toggle__slider::before {
    transform: translateX(22px);
}

.toggle__input:focus + .toggle__slider {
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.toggle__label {
    font-weight: 500;
}

/* ==========================================================================
   Cards
   ========================================================================== */

.card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
}

.card--interactive {
    cursor: pointer;
    transition: all var(--transition-fast);
}

.card--interactive:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

.card--selected {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

/* ==========================================================================
   Option Cards (Voting)
   ========================================================================== */

.option-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-3);
}

.option-card:hover {
    border-color: var(--color-border-hover);
    background-color: var(--color-bg-secondary);
}

.option-card--selected {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

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

.option-card__radio {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.option-card--selected .option-card__radio {
    border-color: var(--color-primary);
    background-color: var(--color-primary);
}

.option-card--selected .option-card__radio::after {
    content: '';
    width: 8px;
    height: 8px;
    background-color: white;
    border-radius: 50%;
}

.option-card__text {
    flex: 1;
    font-weight: 500;
}

/* ==========================================================================
   Countdown Timer
   ========================================================================== */

.countdown {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-6);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
}

.countdown__unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 60px;
}

.countdown__value {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-secondary);
    line-height: 1;
}

.countdown__label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--space-1);
}

.countdown--expired .countdown__value {
    color: var(--color-error);
}

.countdown--small {
    padding: var(--space-4);
    gap: var(--space-3);
}

.countdown--small .countdown__unit {
    min-width: 50px;
}

.countdown--small .countdown__value {
    font-size: var(--font-size-2xl);
}

/* ==========================================================================
   Results Chart
   ========================================================================== */

.results {
    margin-bottom: var(--space-6);
}

.result-bar {
    margin-bottom: var(--space-4);
}

.result-bar__header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--space-2);
}

.result-bar__label {
    font-weight: 500;
    word-break: break-word;
}

.result-bar__stats {
    display: flex;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    flex-shrink: 0;
    margin-left: var(--space-2);
}

.result-bar__percentage {
    font-weight: 600;
    color: var(--color-text);
}

.result-bar__track {
    height: 12px;
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.result-bar__fill {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    min-width: 0;
}

.result-bar--winner .result-bar__fill {
    background-color: var(--color-success);
}

.results__total {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Voters Section
   ========================================================================== */

.voters-section {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-6);
}

.voters-section .section-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.voters-count {
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--color-text-muted);
}

.voters-group {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin-bottom: var(--space-3);
    border: 1px solid var(--color-border);
}

.voters-group:last-child {
    margin-bottom: 0;
}

.voters-group--empty {
    padding: var(--space-3) var(--space-4);
    opacity: 0.6;
}

.voters-group__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

.voters-group__title {
    font-weight: 600;
    color: var(--color-text);
}

.voters-group__badge {
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: var(--space-1) var(--space-2);
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    min-width: 24px;
    text-align: center;
}

.voters-group:not(.voters-group--empty) .voters-group__badge {
    background-color: var(--color-primary);
    color: white;
}

.voters-group__list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border);
}

.voter-tag {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background-color: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.voter-tag::before {
    content: '';
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
    margin-right: var(--space-2);
}

/* ==========================================================================
   Options List (Create page)
   ========================================================================== */

.options-list {
    margin-bottom: var(--space-4);
}

.option-item {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.option-item__input {
    flex: 1;
}

.option-item__remove {
    color: var(--color-text-muted);
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
    border-radius: var(--radius);
    transition: all var(--transition-fast);
}

.option-item__remove:hover {
    color: var(--color-error);
    background-color: var(--color-bg-tertiary);
}

.option-item__remove:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ==========================================================================
   Share Section
   ========================================================================== */

.share {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-4);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius);
    margin-bottom: var(--space-6);
}

.share__input {
    flex: 1;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background-color: var(--color-bg);
    color: var(--color-text);
    font-size: var(--font-size-sm);
}

.share__input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
    text-align: center;
    padding: var(--space-12) 0;
}

.hero__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-6);
    color: var(--color-primary);
}

.hero__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    line-height: 1.1;
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================================================
   Status Messages
   ========================================================================== */

.status {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius);
    margin-bottom: var(--space-6);
}

.status--info {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.status--success {
    background-color: #d1fae5;
    color: #065f46;
}

.status--warning {
    background-color: #fef3c7;
    color: #92400e;
}

.status--error {
    background-color: #fee2e2;
    color: #991b1b;
}

@media (prefers-color-scheme: dark) {
    .status--success {
        background-color: #064e3b;
        color: #6ee7b7;
    }

    .status--warning {
        background-color: #78350f;
        color: #fcd34d;
    }

    .status--error {
        background-color: #7f1d1d;
        color: #fca5a5;
    }
}

.status__icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ==========================================================================
   Loading States
   ========================================================================== */

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    color: var(--color-text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading__text {
    margin-top: var(--space-4);
    font-size: var(--font-size-sm);
}

/* ==========================================================================
   Empty States
   ========================================================================== */

.empty {
    text-align: center;
    padding: var(--space-12);
    color: var(--color-text-secondary);
}

.empty__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    color: var(--color-text-muted);
}

.empty__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

/* ==========================================================================
   Utilities
   ========================================================================== */

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

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

.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.hidden {
    display: none !important;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 480px) {
    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .hero__subtitle {
        font-size: var(--font-size-lg);
    }

    .countdown__value {
        font-size: var(--font-size-3xl);
    }

    .countdown__unit {
        min-width: 50px;
    }

    .share {
        flex-direction: column;
    }

    .result-bar__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-1);
    }

    .result-bar__stats {
        margin-left: 0;
    }
}