/* RandyN Toolkit — Premium Design System v4 (Glassmorphism + Mist) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
    color-scheme: dark;
    /* Layout */
    --sb-w: 260px;

    /* Sidebar — Frosted dark panel */
    --sb-bg: rgba(10,12,20,0.85);
    --sb-backdrop: blur(20px);
    --sb-border: rgba(255,255,255,0.06);
    --sb-text: #6b7280;
    --sb-text-hover: #d1d5db;
    --sb-hover-bg: rgba(255,255,255,0.04);
    --sb-active-bg: rgba(59,130,246,0.1);
    --sb-active-text: #60a5fa;
    --sb-active-border: #3b82f6;
    --sb-label: #4b5563;

    /* Main — Deep navy with gradient glow */
    --main-bg: #0B0F19;
    --main-text: #e5e7eb;
    --main-text-sub: #9ca3af;
    --main-text-muted: #6b7280;

    /* Cards — Frosted glass */
    --card-bg: rgba(255,255,255,0.04);
    --card-backdrop: blur(16px);
    --card-border: rgba(255,255,255,0.07);
    --card-hover-border: rgba(59,130,246,0.2);
    --card-shadow: 0 2px 8px rgba(0,0,0,0.2);
    --card-hover-shadow: 0 8px 32px rgba(59,130,246,0.08);

    /* Inputs */
    --input-bg: rgba(255,255,255,0.05);
    --input-border: rgba(255,255,255,0.08);
    --input-focus: rgba(59,130,246,0.5);

    /* Accents — Blue/Cyan gradient system */
    --accent: #3b82f6;
    --accent-glow: rgba(59,130,246,0.15);
    --accent-gradient: linear-gradient(135deg, #2563eb, #0891b2);
    --cyan: #06b6d4;
    --cyan-glow: rgba(6,182,212,0.15);
    --green: #10b981;
    --green-glow: rgba(16,185,129,0.12);
    --amber: #f59e0b;
    --rose: #f43f5e;
    --violet: #8b5cf6;

    /* Divider */
    --divider: rgba(255,255,255,0.06);

    /* Donate */
    --donate-bg: rgba(251,191,36,0.04);
    --donate-border: rgba(251,191,36,0.1);
    --donate-text: #fbbf24;
}

/* S1 Mist — Soft light theme, easy on eyes */
[data-theme="light"] {
    color-scheme: light;
    --sb-bg: rgba(218,224,236,0.7);
    --sb-backdrop: blur(20px);
    --sb-border: rgba(180,190,210,0.4);
    --sb-text: #5a6478;
    --sb-text-hover: #1e293b;
    --sb-hover-bg: rgba(59,130,246,0.04);
    --sb-active-bg: rgba(59,130,246,0.1);
    --sb-active-text: #2563eb;
    --sb-active-border: #3b82f6;
    --sb-label: #7a8498;

    --main-bg: #E4E9F2;
    --main-text: #1a2030;
    --main-text-sub: #5a6478;
    --main-text-muted: #7a8498;

    --card-bg: rgba(245,247,252,0.65);
    --card-backdrop: blur(12px);
    --card-border: rgba(200,210,225,0.5);
    --card-hover-border: rgba(59,130,246,0.25);
    --card-shadow: 0 1px 8px rgba(0,0,0,0.03);
    --card-hover-shadow: 0 8px 24px rgba(59,130,246,0.06);

    --input-bg: rgba(230,235,245,0.7);
    --input-border: rgba(190,200,218,0.5);
    --input-focus: rgba(59,130,246,0.4);

    --divider: rgba(200,210,225,0.35);

    --donate-bg: rgba(251,191,36,0.06);
    --donate-border: rgba(251,191,36,0.15);
    --donate-text: #b45309;
}

/* ===== RESETS ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    background: var(--main-bg);
    color: var(--main-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background 0.3s, color 0.3s;
}

/* ===== SELECT & OPTION (Global Dark) ===== */
select {
    appearance: none;
    -webkit-appearance: none;
    color-scheme: dark;
    background: var(--input-bg);
    color: var(--main-text);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    padding: 10px 36px 10px 14px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    outline: none;
    transition: all 0.2s ease;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 14px;
}
[data-theme="light"] select {
    color-scheme: light;
}
select:hover {
    border-color: var(--card-hover-border);
    background-color: rgba(255,255,255,0.06);
}
select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
select option,
select optgroup {
    background: #12121a;
    color: #e5e7eb;
    padding: 8px 12px;
    font-size: 14px;
}
select option:hover,
select option:checked {
    background: #1e3a5f;
    color: #ffffff;
}
select optgroup {
    font-weight: 700;
    color: #9ca3af;
}

/* Light theme select overrides */
[data-theme="light"] select {
    background-color: var(--input-bg);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234b5563' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
}
[data-theme="light"] select option,
[data-theme="light"] select optgroup {
    background: #ffffff;
    color: #111827;
}
[data-theme="light"] select option:checked {
    background: #dbeafe;
    color: #1e40af;
}

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: var(--sb-w);
    background: var(--sb-bg);
    backdrop-filter: var(--sb-backdrop, none);
    -webkit-backdrop-filter: var(--sb-backdrop, none);
    border-right: 1px solid var(--sb-border);
    display: flex; flex-direction: column;
    z-index: 200; overflow-y: auto; overflow-x: hidden;
    transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Sidebar collapsed */
.sidebar.collapsed { width: 64px; }
.sidebar.collapsed .sb-name,
.sidebar.collapsed .sb-text,
.sidebar.collapsed .sb-badge,
.sidebar.collapsed .sb-label,
.sidebar.collapsed .sb-donate-text,
.sidebar.collapsed .sb-donate-sub,
.sidebar.collapsed .sb-copyright,
.sidebar.collapsed .sb-status span:not(.sb-status-dot) { display: none; }
.sidebar.collapsed .sb-brand { justify-content: center; padding: 20px 10px; }
.sidebar.collapsed .sb-item { justify-content: center; padding: 10px 0; margin: 2px 6px; border-left: none; }
.sidebar.collapsed .sb-icon { width: auto; }
.sidebar.collapsed .sb-donate { justify-content: center; padding: 10px; }
.sidebar.collapsed .sb-donate-icon { margin: 0; }
.sidebar.collapsed .sb-status { justify-content: center; padding: 12px 0; }
.sb-collapse-btn {
    width: 100%; padding: 10px; border: none; background: transparent;
    color: var(--sb-text); font-size: 18px; cursor: pointer;
    border-top: 1px solid var(--sb-border); transition: color 0.2s;
}
.sb-collapse-btn:hover { color: var(--main-text); background: var(--sb-hover-bg); }

.sb-brand {
    padding: 24px 20px 20px;
    display: flex; align-items: center; gap: 12px;
    border-bottom: 1px solid var(--sb-border);
}
.sb-logo { font-size: 22px; }
.sb-name {
    font-size: 18px; font-weight: 800;
    color: var(--main-text);
    letter-spacing: -0.5px;
}
.sb-version {
    font-size: 11px; font-weight: 700; color: var(--sb-label);
    margin-left: auto;
}
.sb-nav { flex: 1; padding: 16px 0; }
.sb-section { margin-bottom: 12px; }
.sb-label {
    display: block; padding: 8px 20px 6px;
    font-size: 12px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 1.2px;
    color: var(--sb-label);
}
.sb-item {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 20px; margin: 2px 8px; border-radius: 10px;
    font-size: 15px; font-weight: 500;
    color: var(--sb-text); text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.15s ease; cursor: pointer;
    margin-left: 0; margin-right: 0;
}
.sb-item:hover {
    background: var(--sb-hover-bg);
    color: var(--sb-text-hover);
}
.sb-item.active {
    background: var(--sb-active-bg);
    color: var(--sb-active-text);
    border-left-color: var(--sb-active-border);
    font-weight: 700;
}
.sb-item.disabled { opacity: 0.35; cursor: not-allowed; }
.sb-item.disabled:hover { background: transparent; color: var(--sb-text); }
.sb-icon { font-size: 17px; width: 22px; text-align: center; flex-shrink: 0; }
.sb-text { flex: 1; }
.sb-badge {
    padding: 3px 8px; border-radius: 6px;
    font-size: 11px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.3px;
}
.sb-badge.new { background: rgba(59,130,246,0.1); color: #60a5fa; }
.sb-badge.live { background: rgba(16,185,129,0.08); color: #34d399; }
.sb-badge.soon { background: rgba(245,158,11,0.06); color: #fbbf24; }

/* Sidebar status */
.sb-status {
    padding: 12px 20px; display: flex; align-items: center; gap: 8px;
    font-size: 14px; color: var(--sb-text);
}
.sb-status-dot {
    width: 8px; height: 8px; border-radius: 50%; background: #10b981;
    box-shadow: 0 0 8px rgba(16,185,129,0.5);
    animation: statusPulse 2s ease-in-out infinite;
}
@keyframes statusPulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 8px rgba(16,185,129,0.5); }
    50% { opacity: 0.6; box-shadow: 0 0 4px rgba(16,185,129,0.3); }
}

/* Sidebar footer — Donate */
.sb-footer {
    padding: 16px;
    border-top: 1px solid var(--sb-border);
}
.sb-donate {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 14px; border-radius: 12px;
    background: var(--donate-bg);
    border: 1px solid var(--donate-border);
    cursor: pointer; text-decoration: none;
    transition: all 0.2s;
}
.sb-donate:hover { border-color: rgba(251,191,36,0.25); transform: translateY(-1px); }
.sb-donate-icon {
    width: 34px; height: 34px; border-radius: 10px;
    background: linear-gradient(135deg, rgba(251,191,36,0.1), rgba(245,158,11,0.1));
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; flex-shrink: 0;
}
.sb-donate-text { font-size: 14px; color: var(--donate-text); font-weight: 600; line-height: 1.4; }
.sb-donate-sub { font-size: 12px; color: var(--sb-text); font-weight: 500; }
.sb-copyright {
    text-align: center; margin-top: 12px;
    font-size: 12px; color: var(--sb-label); letter-spacing: 0.3px;
}

/* ===== THEME TOGGLE ===== */
.theme-toggle {
    position: fixed; top: 18px; right: 22px; z-index: 300;
    width: 44px; height: 44px; border-radius: 12px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    color: var(--main-text-sub); font-size: 18px;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: all 0.2s;
    box-shadow: var(--card-shadow);
}
.theme-toggle:hover {
    border-color: var(--card-hover-border);
    color: var(--main-text);
    transform: scale(1.05);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sb-w);
    min-height: 100vh; position: relative;
    transition: margin-left 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
body.sb-collapsed .main-content { margin-left: 64px; }
body.sb-collapsed .main-content::before { left: 64px; }

/* V4 Glassmorphism: Ambient gradient glow */
.main-content::before {
    content: '';
    position: fixed; top: 0; left: var(--sb-w); right: 0; bottom: 0;
    background:
        radial-gradient(ellipse 700px 450px at 15% 5%, rgba(59,130,246,0.06) 0%, transparent 100%),
        radial-gradient(ellipse 550px 350px at 85% 90%, rgba(6,182,212,0.04) 0%, transparent 100%);
    z-index: -1; pointer-events: none;
}

/* Page content layouts */
.page-home { padding: 36px 40px; }
.page-tool { padding: 32px 36px; min-height: 100vh; }
.page-checkout { padding: 32px 36px; min-height: 100vh; }

/* ===== GLASS CARD (V4: frosted glass with backdrop blur) ===== */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: var(--card-backdrop, none);
    -webkit-backdrop-filter: var(--card-backdrop, none);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    transition: all 0.25s ease;
}
.glass-card:hover {
    border-color: var(--card-hover-border);
    box-shadow: var(--card-hover-shadow);
}

/* ===== CARD GLOW ===== */
.glow-card {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    overflow: hidden;
}
.glow-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(59,130,246,0.3), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}
.glow-card:hover::before { opacity: 1; }
.glow-card:hover {
    border-color: var(--card-hover-border);
    box-shadow: var(--card-hover-shadow);
    transform: translateY(-2px);
}

/* ===== SKELETON LOADING ===== */
.skeleton {
    background: linear-gradient(90deg,
        var(--card-bg) 25%,
        rgba(255,255,255,0.06) 50%,
        var(--card-bg) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease infinite;
    border-radius: 8px;
}
@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ===== STAGGER ENTRANCE ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
.stagger { animation: fadeInUp 0.4s ease both; }
.stagger:nth-child(1) { animation-delay: 0ms; }
.stagger:nth-child(2) { animation-delay: 60ms; }
.stagger:nth-child(3) { animation-delay: 120ms; }
.stagger:nth-child(4) { animation-delay: 180ms; }
.stagger:nth-child(5) { animation-delay: 240ms; }
.stagger:nth-child(6) { animation-delay: 300ms; }

/* ===== QR DONATE MODAL ===== */
.qr-modal-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.75);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    z-index: 500;
    align-items: center; justify-content: center;
    animation: modalFadeIn 0.2s ease;
}
.qr-modal-overlay.on { display: flex; }
@keyframes modalFadeIn { from { opacity: 0; } }

.qr-modal {
    background: #0c0c10;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 20px; padding: 36px;
    max-width: 400px; width: 90%;
    text-align: center;
    box-shadow: 0 40px 120px rgba(0,0,0,0.6);
    animation: modalSlideIn 0.3s ease;
}
[data-theme="light"] .qr-modal {
    background: #ffffff;
    border-color: rgba(0,0,0,0.08);
    box-shadow: 0 40px 80px rgba(0,0,0,0.15);
}
@keyframes modalSlideIn { from { opacity:0; transform:translateY(16px) scale(0.97); } }

.qr-modal h3 {
    font-size: 20px; font-weight: 800; color: #fbbf24;
    margin-bottom: 6px;
}
.qr-modal .qr-subtitle {
    font-size: 14px; color: var(--main-text-sub); margin-bottom: 24px;
}
.qr-modal .qr-img-wrap {
    background: #fff; border-radius: 16px; padding: 16px;
    display: inline-block; margin-bottom: 20px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}
.qr-modal .qr-img-wrap img {
    width: 240px; height: 240px; display: block; border-radius: 8px;
}
.qr-modal .qr-bank {
    font-size: 15px; color: var(--main-text-sub); line-height: 1.8;
}
.qr-modal .qr-bank strong {
    color: var(--main-text); font-weight: 700; display: block; font-size: 16px;
}
.qr-modal .qr-bank .qr-acct {
    font-family: 'JetBrains Mono', monospace;
    color: #60a5fa; font-size: 17px; font-weight: 700;
    letter-spacing: 1.5px;
}
.qr-modal .qr-close {
    margin-top: 20px;
    padding: 10px 28px; border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.1);
    background: transparent; color: var(--main-text-sub);
    font-size: 14px; font-weight: 600; cursor: pointer;
    font-family: inherit; transition: all 0.2s;
}
.qr-modal .qr-close:hover { border-color: var(--accent); color: var(--accent); }

/* ===== MOBILE ===== */
.mobile-header {
    display: none; position: fixed; top: 0; left: 0; right: 0;
    height: 60px; background: var(--sb-bg);
    border-bottom: 1px solid var(--sb-border);
    padding: 0 16px; align-items: center; gap: 14px; z-index: 150;
}
.hamburger {
    width: 44px; height: 44px; border: none; border-radius: 12px;
    background: transparent; color: var(--main-text);
    font-size: 24px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
}
.mobile-brand {
    font-size: 16px; font-weight: 800;
    color: var(--main-text);
}
.sb-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
    z-index: 190;
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .sb-overlay.open { display: block; }
    .main-content { margin-left: 0; padding-top: 60px; }
    .mobile-header { display: flex; }
    .theme-toggle { top: 70px; right: 14px; width: 40px; height: 40px; font-size: 16px; }
    .page-home { padding: 24px 20px; }
    .page-tool, .page-checkout { padding: 16px; }
}