/* ============================================================
   FluxHub Hosting Platform - Main Stylesheet
   Design: Dark navy + Electric blue accent, Modern hosting UI
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@300;400;500;600;700;800;900&display=swap');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/variable/pretendardvariable.css');

/* ======================== Variables ======================== */
:root {
    --flux-bg: #0a0e1a;
    --flux-bg-elevated: #111827;
    --flux-bg-card: #1a2035;
    --flux-bg-card-hover: #1f2847;
    --flux-border: #2a3352;
    --flux-border-light: #374168;

    --flux-text: #e8ecf4;
    --flux-text-secondary: #8892a8;
    --flux-text-muted: #5a6478;

    --flux-primary: #3b82f6;
    --flux-primary-hover: #2563eb;
    --flux-primary-glow: rgba(59, 130, 246, 0.15);
    --flux-primary-soft: rgba(59, 130, 246, 0.08);

    --flux-success: #10b981;
    --flux-success-bg: rgba(16, 185, 129, 0.1);
    --flux-warning: #f59e0b;
    --flux-warning-bg: rgba(245, 158, 11, 0.1);
    --flux-danger: #ef4444;
    --flux-danger-bg: rgba(239, 68, 68, 0.1);

    --flux-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --flux-gradient-subtle: linear-gradient(135deg, rgba(59,130,246,0.1) 0%, rgba(139,92,246,0.1) 100%);
    --flux-mesh-1: radial-gradient(ellipse at 20% 50%, rgba(59,130,246,0.08) 0%, transparent 50%);
    --flux-mesh-2: radial-gradient(ellipse at 80% 20%, rgba(139,92,246,0.06) 0%, transparent 50%);
    --flux-mesh-3: radial-gradient(ellipse at 50% 80%, rgba(16,185,129,0.04) 0%, transparent 50%);

    --flux-radius-sm: 8px;
    --flux-radius: 12px;
    --flux-radius-lg: 16px;
    --flux-radius-xl: 24px;

    --flux-shadow: 0 4px 24px rgba(0,0,0,0.3);
    --flux-shadow-lg: 0 8px 48px rgba(0,0,0,0.4);
    --flux-shadow-glow: 0 0 40px rgba(59,130,246,0.15);

    --flux-font: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --flux-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --flux-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --flux-transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--flux-font);
    background: var(--flux-bg);
    color: var(--flux-text);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: var(--flux-mesh-1), var(--flux-mesh-2), var(--flux-mesh-3);
    pointer-events: none;
    z-index: 0;
}

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

img { max-width: 100%; height: auto; }

/* ======================== Layout ======================== */
.flux-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.flux-container--narrow {
    max-width: 720px;
}

.flux-container--wide {
    max-width: 1400px;
}

/* ======================== Header ======================== */
.flux-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 24px;
    transition: background var(--flux-transition), backdrop-filter var(--flux-transition);
}

.flux-header.scrolled {
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--flux-border);
}

.flux-header__inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.flux-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--flux-text);
    letter-spacing: -0.03em;
}

.flux-logo__icon {
    width: 36px;
    height: 36px;
    background: var(--flux-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #fff;
    font-weight: 900;
    box-shadow: 0 0 20px rgba(59,130,246,0.3);
}

.flux-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.flux-nav__link {
    color: var(--flux-text-secondary);
    padding: 8px 16px;
    border-radius: var(--flux-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--flux-transition);
}
.flux-nav__link:hover {
    color: var(--flux-text);
    background: var(--flux-primary-soft);
}

/* ======================== Buttons ======================== */
.flux-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--flux-radius);
    font-family: var(--flux-font);
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--flux-transition);
    white-space: nowrap;
    text-decoration: none;
    line-height: 1.4;
}

.flux-btn--primary {
    background: var(--flux-gradient);
    color: #fff;
    box-shadow: 0 4px 16px rgba(59,130,246,0.3);
}
.flux-btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(59,130,246,0.4);
    color: #fff;
}

.flux-btn--secondary {
    background: var(--flux-bg-card);
    color: var(--flux-text);
    border: 1px solid var(--flux-border);
}
.flux-btn--secondary:hover {
    background: var(--flux-bg-card-hover);
    border-color: var(--flux-border-light);
    color: var(--flux-text);
}

.flux-btn--ghost {
    background: transparent;
    color: var(--flux-text-secondary);
    border: 1px solid var(--flux-border);
}
.flux-btn--ghost:hover {
    background: var(--flux-primary-soft);
    color: var(--flux-primary);
    border-color: var(--flux-primary);
}

.flux-btn--danger {
    background: var(--flux-danger-bg);
    color: var(--flux-danger);
    border: 1px solid rgba(239,68,68,0.2);
}
.flux-btn--danger:hover {
    background: var(--flux-danger);
    color: #fff;
}

.flux-btn--sm {
    padding: 8px 16px;
    font-size: 0.8rem;
    border-radius: var(--flux-radius-sm);
}

.flux-btn--lg {
    padding: 16px 40px;
    font-size: 1rem;
}

.flux-btn:disabled, .flux-btn--loading {
    opacity: 0.6;
    pointer-events: none;
}

.flux-btn--loading::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: flux-spin 0.6s linear infinite;
}

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

/* ======================== Hero Section ======================== */
.flux-hero {
    padding: 160px 0 100px;
    text-align: center;
    position: relative;
}

.flux-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--flux-primary-soft);
    border: 1px solid rgba(59,130,246,0.2);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--flux-primary);
    margin-bottom: 24px;
    animation: flux-fade-up 0.6s ease-out;
}

.flux-hero__title {
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: -0.04em;
    margin-bottom: 20px;
    animation: flux-fade-up 0.6s ease-out 0.1s both;
}

.flux-hero__title em {
    font-style: normal;
    background: var(--flux-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.flux-hero__desc {
    font-size: 1.15rem;
    color: var(--flux-text-secondary);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.8;
    animation: flux-fade-up 0.6s ease-out 0.2s both;
}

.flux-hero__actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    animation: flux-fade-up 0.6s ease-out 0.3s both;
}

@keyframes flux-fade-up {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ======================== Features ======================== */
.flux-features {
    padding: 80px 0;
}

.flux-section-title {
    text-align: center;
    margin-bottom: 56px;
}

.flux-section-title h2 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}

.flux-section-title p {
    color: var(--flux-text-secondary);
    font-size: 1.05rem;
}

.flux-features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.flux-feature-card {
    background: var(--flux-bg-card);
    border: 1px solid var(--flux-border);
    border-radius: var(--flux-radius-lg);
    padding: 32px;
    transition: all var(--flux-transition);
}

.flux-feature-card:hover {
    background: var(--flux-bg-card-hover);
    border-color: var(--flux-border-light);
    transform: translateY(-4px);
    box-shadow: var(--flux-shadow);
}

.flux-feature-card__icon {
    width: 48px;
    height: 48px;
    border-radius: var(--flux-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 20px;
    background: var(--flux-gradient-subtle);
    border: 1px solid rgba(59,130,246,0.15);
}

.flux-feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.flux-feature-card p {
    color: var(--flux-text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ======================== Pricing ======================== */
.flux-pricing {
    padding: 80px 0;
}

.flux-pricing__card {
    max-width: 480px;
    margin: 0 auto;
    background: var(--flux-bg-card);
    border: 2px solid var(--flux-primary);
    border-radius: var(--flux-radius-xl);
    padding: 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--flux-shadow-glow);
}

.flux-pricing__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--flux-gradient);
}

.flux-pricing__name {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.flux-pricing__price {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -0.04em;
    margin-bottom: 4px;
    background: var(--flux-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.flux-pricing__period {
    color: var(--flux-text-muted);
    font-size: 0.85rem;
    margin-bottom: 32px;
}

.flux-pricing__features {
    list-style: none;
    text-align: left;
    margin-bottom: 36px;
}

.flux-pricing__features li {
    padding: 10px 0;
    border-bottom: 1px solid var(--flux-border);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.flux-pricing__features li::before {
    content: '✓';
    color: var(--flux-success);
    font-weight: 700;
    flex-shrink: 0;
}

/* ======================== Dashboard ======================== */
.flux-dashboard {
    padding: 120px 0 60px;
}

.flux-dashboard__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
}

.flux-dashboard__header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.flux-site-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 20px;
}

/* ======================== Site Card ======================== */
.flux-site-card {
    background: var(--flux-bg-card);
    border: 1px solid var(--flux-border);
    border-radius: var(--flux-radius-lg);
    padding: 28px;
    transition: all var(--flux-transition);
}
.flux-site-card:hover {
    border-color: var(--flux-border-light);
    box-shadow: var(--flux-shadow);
}

.flux-site-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.flux-site-card__name {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.flux-site-card__domain {
    font-size: 0.8rem;
    color: var(--flux-text-muted);
    font-family: var(--flux-mono);
    margin-top: 4px;
}

.flux-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.flux-status-badge--running {
    background: var(--flux-success-bg);
    color: var(--flux-success);
}
.flux-status-badge--running::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--flux-success);
    animation: flux-pulse 2s infinite;
}

.flux-status-badge--stopped {
    background: var(--flux-danger-bg);
    color: var(--flux-danger);
}

.flux-status-badge--suspended {
    background: var(--flux-warning-bg);
    color: var(--flux-warning);
}

@keyframes flux-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.flux-site-card__stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.flux-stat {
    background: var(--flux-bg-elevated);
    border-radius: var(--flux-radius-sm);
    padding: 12px;
    text-align: center;
}

.flux-stat__label {
    font-size: 0.7rem;
    color: var(--flux-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}

.flux-stat__value {
    font-size: 0.95rem;
    font-weight: 700;
    font-family: var(--flux-mono);
}

.flux-site-card__actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ======================== Create Site Form ======================== */
.flux-create {
    padding: 120px 0 60px;
}

.flux-form-card {
    max-width: 560px;
    margin: 0 auto;
    background: var(--flux-bg-card);
    border: 1px solid var(--flux-border);
    border-radius: var(--flux-radius-xl);
    padding: 48px;
}

.flux-form-card h1 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 8px;
    letter-spacing: -0.03em;
}

.flux-form-card__desc {
    color: var(--flux-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 36px;
}

.flux-field {
    margin-bottom: 24px;
}

.flux-field label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--flux-text);
}

.flux-field__hint {
    font-size: 0.78rem;
    color: var(--flux-text-muted);
    margin-top: 6px;
}

.flux-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--flux-bg-elevated);
    border: 1px solid var(--flux-border);
    border-radius: var(--flux-radius);
    color: var(--flux-text);
    font-family: var(--flux-font);
    font-size: 0.9rem;
    transition: all var(--flux-transition);
    outline: none;
}

.flux-input:focus {
    border-color: var(--flux-primary);
    box-shadow: 0 0 0 3px var(--flux-primary-glow);
}

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

.flux-input--error {
    border-color: var(--flux-danger);
    box-shadow: 0 0 0 3px var(--flux-danger-bg);
}

/* 서브도메인 입력 (suffix 포함) */
.flux-domain-input {
    display: flex;
    align-items: stretch;
    border-radius: var(--flux-radius);
    overflow: hidden;
    border: 1px solid var(--flux-border);
    transition: all var(--flux-transition);
}

.flux-domain-input:focus-within {
    border-color: var(--flux-primary);
    box-shadow: 0 0 0 3px var(--flux-primary-glow);
}

.flux-domain-input .flux-input {
    border: none;
    border-radius: 0;
    box-shadow: none;
}

.flux-domain-input .flux-input:focus {
    box-shadow: none;
}

.flux-domain-input__suffix {
    display: flex;
    align-items: center;
    padding: 0 16px;
    background: rgba(59,130,246,0.08);
    color: var(--flux-text-secondary);
    font-size: 0.85rem;
    font-family: var(--flux-mono);
    white-space: nowrap;
    border-left: 1px solid var(--flux-border);
}

/* Select */
.flux-select {
    width: 100%;
    padding: 12px 16px;
    background: var(--flux-bg-elevated);
    border: 1px solid var(--flux-border);
    border-radius: var(--flux-radius);
    color: var(--flux-text);
    font-family: var(--flux-font);
    font-size: 0.9rem;
    cursor: pointer;
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238892a8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.flux-select:focus {
    border-color: var(--flux-primary);
    box-shadow: 0 0 0 3px var(--flux-primary-glow);
}

.flux-select option {
    background: var(--flux-bg-card);
    color: var(--flux-text);
}

/* ======================== Result Panel ======================== */
.flux-result {
    display: none;
    margin-top: 32px;
    background: var(--flux-bg-elevated);
    border: 1px solid var(--flux-border);
    border-radius: var(--flux-radius-lg);
    overflow: hidden;
}

.flux-result.active {
    display: block;
    animation: flux-fade-up 0.4s ease-out;
}

.flux-result__header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--flux-border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.flux-result__header--success {
    background: var(--flux-success-bg);
}
.flux-result__header--error {
    background: var(--flux-danger-bg);
}

.flux-result__header h3 {
    font-size: 1rem;
    font-weight: 700;
}

.flux-result__body {
    padding: 24px;
}

.flux-result__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--flux-border);
    font-size: 0.85rem;
}
.flux-result__row:last-child {
    border-bottom: none;
}

.flux-result__label {
    color: var(--flux-text-secondary);
    font-weight: 500;
}

.flux-result__value {
    font-family: var(--flux-mono);
    font-weight: 600;
    color: var(--flux-text);
    user-select: all;
}

/* ======================== Alert Messages ======================== */
.flux-alert {
    padding: 14px 20px;
    border-radius: var(--flux-radius);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.flux-alert--error {
    background: var(--flux-danger-bg);
    color: var(--flux-danger);
    border: 1px solid rgba(239,68,68,0.2);
}

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

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

/* ======================== Footer ======================== */
.flux-footer {
    padding: 48px 0;
    border-top: 1px solid var(--flux-border);
    margin-top: 80px;
}

.flux-footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--flux-text-muted);
}

/* ======================== Loading Overlay ======================== */
.flux-loading {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10,14,26,0.8);
    backdrop-filter: blur(8px);
    z-index: 200;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 20px;
}

.flux-loading.active {
    display: flex;
}

.flux-loading__spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--flux-border);
    border-top-color: var(--flux-primary);
    border-radius: 50%;
    animation: flux-spin 0.8s linear infinite;
}

.flux-loading__text {
    font-size: 0.9rem;
    color: var(--flux-text-secondary);
}

/* ======================== Responsive ======================== */
@media (max-width: 768px) {
    .flux-header__inner { height: 60px; }
    .flux-nav { display: none; }

    .flux-hero { padding: 120px 0 60px; }
    .flux-hero__title { font-size: 2rem; }
    .flux-hero__desc { font-size: 1rem; }
    .flux-hero__actions { flex-direction: column; align-items: center; }

    .flux-features__grid { grid-template-columns: 1fr; }

    .flux-pricing__card { padding: 32px; }
    .flux-pricing__price { font-size: 2.4rem; }

    .flux-form-card { padding: 28px; }

    .flux-site-grid { grid-template-columns: 1fr; }
    .flux-site-card__stats { grid-template-columns: repeat(3, 1fr); }

    .flux-dashboard__header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .flux-footer__inner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}