@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
    --color-primary: #0ea5e9;
    --color-secondary: #8b5cf6;
    --color-glow: rgba(14, 165, 233, 0.4);
    
    --color-bg: #0f172a;
    --color-text: #94a3b8;
    --color-text-strong: #f8fafc;
    --color-header-bg: rgba(15, 23, 42, 0.8);
    --color-card-bg: rgba(30, 41, 59, 0.5);
    --color-card-bg-opaque: rgb(30, 41, 59);
    --color-border: rgba(51, 65, 85, 0.7);
    --color-code-bg: #1e293b;
    --color-footer-bg: rgba(15, 23, 42, 0.7);
}

body.light-mode {
    --color-bg: #f1f5f9;
    --color-text: #475569;
    --color-text-strong: #0f172a;
    --color-header-bg: rgba(241, 245, 249, 0.8);
    --color-card-bg: rgba(255, 255, 255, 0.8);
    --color-card-bg-opaque: #ffffff;
    --color-border: rgba(203, 213, 225, 0.9);
    --color-code-bg: #e2e8f0;
    --color-footer-bg: rgba(226, 232, 240, 0.7);
    --color-glow: rgba(14, 165, 233, 0.3);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

header {
    background-color: var(--color-header-bg);
    border-bottom: 1px solid var(--color-border);
}

#mobile-menu {
    background-color: var(--color-header-bg);
    border-top: 1px solid var(--color-border);
}

.gradient-text {
    background-image: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav-link {
    color: var(--color-text);
    transition: color 0.3s ease-in-out;
    position: relative;
}
.nav-link:hover { color: var(--color-text-strong); }

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    background-image: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transition: width 0.3s ease-in-out;
}

.nav-link:hover::after { width: 100%; }

.theme-toggle-btn { color: var(--color-text); }
.theme-toggle-btn:hover { color: var(--color-text-strong); }

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    transition: all 0.3s ease-in-out;
    border: none;
    cursor: pointer;
}
.btn-sm {
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-weight: 600;
    box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    transition: all 0.3s ease-in-out;
    font-size: 0.875rem;
    border: none;
    cursor: pointer;
}

.btn-glow {
    color: white;
    background-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    background-size: 200% 100%;
    background-position: left;
    position: relative;
    overflow: hidden;
    isolation: isolate;
    border-radius: 0.5rem;
}
.btn-glow:hover {
    background-position: right;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}
.btn-outline:hover {
    background-color: var(--color-primary);
    color: white;
}

.themed-card {
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
}
.themed-card-darker { background-color: var(--color-code-bg); }
.themed-code-block { background-color: var(--color-code-bg); }

.step-box {
    background-color: var(--color-card-bg-opaque);
    border: 1px solid var(--color-border);
}

.step-box-text { color: var(--color-text); }
body.light-mode .step-box-text { color: #334155; }

.step-number {
    background-color: var(--color-code-bg);
    color: var(--color-text-strong);
    font-weight: bold;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 9999px;
    font-size: 1.25rem;
    margin-right: 1rem;
}

.feature-item { color: var(--color-text); }

.info-card {
    background-color: var(--color-card-bg);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    transition: all 0.3s;
}
.info-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 10px 25px -5px var(--color-glow);
    transform: translateY(-0.5rem);
}

.process-steps { border-left: 2px solid var(--color-border); }

.process-step {
    position: relative;
    padding-left: 2.5rem;
}

.process-step::before {
    content: '';
    position: absolute;
    left: 0;
    transform: translateX(-50%);
    top: 0.25rem;
    width: 1rem;
    height: 1rem;
    border-radius: 9999px;
    background-color: var(--color-bg);
    border: 2px solid var(--color-border);
    transition: all 0.3s ease-in-out;
}

.process-step:first-child::before {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    box-shadow: 0 0 10px var(--color-glow);
}

.guide-card {
    background-color: var(--color-card-bg-opaque);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-height: 180px;
    justify-content: center;
}
.guide-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: 0 10px 30px -10px var(--color-glow);
}
.guide-card-number {
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-image: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    font-size: 1.25rem;
    font-weight: bold;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

footer {
    background-color: var(--color-footer-bg);
    border-top: 1px solid var(--color-border);
}
.footer-link {
    color: var(--color-text);
    transition: all 0.3s ease;
}
.footer-link:hover {
    color: var(--color-primary);
    padding-left: 0.5rem;
}
.border-t-themed { border-top: 1px solid var(--color-border); }
.footer-bottom { color: var(--color-text); }
.footer-bottom a:hover { color: var(--color-text-strong); }

.themed-popup {
    background-color: var(--color-card-bg-opaque);
    backdrop-filter: blur(8px);
    border: 1px solid var(--color-border);
    transition: transform 0.5s ease-in-out, opacity 0.5s ease-in-out;
    opacity: 0;
    transform: translateY(20px);
}
.themed-popup.toast-visible {
    opacity: 1;
    transform: translateY(0);
}

#bookmark-banner {
    background-color: var(--color-card-bg-opaque);
    border-top: 1px solid var(--color-border);
}
.bookmark-banner { color: var(--color-text); }
.bookmark-banner a:hover { color: var(--color-text-strong); }

.btn-bookmark-primary {
    background-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
}
.btn-bookmark-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px -3px var(--color-secondary);
}

.btn-bookmark-secondary {
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn-bookmark-secondary:hover {
    background-color: var(--color-code-bg);
    border-color: var(--color-text);
    color: var(--color-text-strong);
}

.warning-box {
    background-color: rgba(133, 76, 8, 0.2);
    border: 1px solid rgba(250, 204, 21, 0.3);
    color: #fcd34d;
}
.warning-box-icon { color: #facc15; }
.warning-box-title { color: #fde68a; }
.warning-box strong { color: #fef08a; }

body.light-mode .warning-box {
    background-color: #fefce8;
    border: 1px solid #fde047;
    color: #a16207;
}
body.light-mode .warning-box-icon { color: #f59e0b; }
body.light-mode .warning-box-title { color: #b45309; }
body.light-mode .warning-box strong { color: #78350f; }

.tip-box {
    background-color: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.3);
    border-left: 4px solid var(--color-primary);
    color: #e2e8f0;
}
.tip-box-title {
    color: #7dd3fc;
}

body.light-mode .tip-box {
    background-color: #e0f2fe;
    border: 1px solid #bae6fd;
    border-left: 4px solid var(--color-primary);
    color: #334155;
}
body.light-mode .tip-box-title {
    color: #0369a1;
}

.flashing-green-light {
    background: radial-gradient(circle at 30% 30%, #6ee7b7, #10b981);
    animation: green-flash 1.5s infinite ease-in-out;
    -webkit-animation: green-flash 1.5s infinite ease-in-out;
}

@keyframes green-flash {
    0%, 100% {
        opacity: 0.7;
        box-shadow: 0 0 3px rgba(74, 222, 128, 0.4), inset 0 0 4px rgba(0,0,0,0.2);
    }
    50% {
        opacity: 1;
        box-shadow: 0 0 8px rgba(74, 222, 128, 1), 0 0 15px rgba(74, 222, 128, 0.6), inset 0 0 2px rgba(255,255,255,0.3);
    }
}

.animate-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.animate-section.is-visible { opacity: 1; transform: translateY(0); }

#bookmark-banner.is-hidden { transform: translateY(150%); }

#recharge-modal.is-visible {
    opacity: 1;
    pointer-events: auto;
}

#recharge-modal.is-visible #modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

#modal-content {
    background-color: var(--color-card-bg-opaque);
    border: 1px solid var(--color-border);
    background-image: radial-gradient(circle at top left, rgba(14, 165, 233, 0.15), transparent 30%),
                      radial-gradient(circle at bottom right, rgba(139, 92, 246, 0.15), transparent 30%);
    opacity: 0;
    transform: scale(0.95) translateY(1rem);
}

body.light-mode #modal-content {
    background-image: radial-gradient(circle at top left, rgba(14, 165, 233, 0.1), transparent 40%),
                      radial-gradient(circle at bottom right, rgba(139, 92, 246, 0.1), transparent 40%);
}

.modal-option-btn {
    display: flex;
    align-items: center;
    text-align: left;
    width: 100%;
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--color-border);
    background-color: var(--color-code-bg);
    color: var(--color-text-strong);
    transition: all 0.3s ease-in-out;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.modal-option-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px -5px var(--color-glow);
}

.modal-option-btn:hover i {
    transform: translateX(4px);
}

.modal-option-btn.main-site-btn {
    border-left: 4px solid var(--color-primary);
}

.modal-option-btn.main-site-btn:hover {
    border-color: var(--color-primary);
    background: linear-gradient(90deg, rgba(14, 165, 233, 0.15), transparent);
}

.modal-option-btn.backup-site-btn {
     border-left: 4px solid var(--color-secondary);
}

.modal-option-btn.backup-site-btn:hover {
    border-color: var(--color-secondary);
    background: linear-gradient(90deg, rgba(139, 92, 246, 0.15), transparent);
}

/* Purchase Notice Modal Styles */
#purchase-notice-modal.is-visible {
    opacity: 1;
    pointer-events: auto;
}

#purchase-notice-modal.is-visible #purchase-modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

#purchase-modal-content {
    background-color: var(--color-card-bg-opaque);
    border: 1px solid var(--color-border);
    background-image: radial-gradient(circle at top, rgba(239, 68, 68, 0.1), transparent 50%);
    opacity: 0;
    transform: scale(0.95) translateY(1rem);
}

body.light-mode #purchase-modal-content {
    background-image: radial-gradient(circle at top, rgba(239, 68, 68, 0.08), transparent 50%);
}

.notice-box {
    background-color: var(--color-code-bg);
    padding: 1rem;
    border-radius: 0.75rem;
    border-left: 3px solid rgba(14, 165, 233, 0.5);
    color: var(--color-text);
    line-height: 1.7;
}

body.light-mode .notice-box {
    background-color: rgba(14, 165, 233, 0.05);
    border-left: 3px solid var(--color-primary);
    color: #334155;
}

.purchase-proceed-btn {
    background: linear-gradient(90deg, #0ea5e9, #06b6d4);
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.purchase-proceed-btn:hover {
    background: linear-gradient(90deg, #0284c7, #0891b2);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
    transform: translateY(-2px);
}

.proxy-warning {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 8px rgba(251, 191, 36, 0.4);
    animation: pulse-warning 2s ease-in-out infinite;
}

.proxy-warning p {
    color: #78350f;
    font-size: 0.95rem;
    margin: 0;
}

body.light-mode .proxy-warning {
    background: linear-gradient(135deg, #fef08a, #fde047);
    box-shadow: 0 2px 8px rgba(250, 204, 21, 0.4);
}

body.light-mode .proxy-warning p {
    color: #713f12;
}

@keyframes pulse-warning {
    0%, 100% {
        box-shadow: 0 2px 8px rgba(251, 191, 36, 0.4);
    }
    50% {
        box-shadow: 0 4px 16px rgba(251, 191, 36, 0.7);
    }
}