:root {
    --bg: #0b0e14;
    --bg-2: #12161f;
    --card: rgba(255, 255, 255, 0.045);
    --card-border: rgba(255, 255, 255, 0.09);
    --text: #f2f4f8;
    --text-dim: #9aa3b2;
    --accent: #7c5cff;
    --accent-2: #22d3a5;
    --pink: #ff5c8a;
    --danger: #ff5c5c;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.bg-blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.32;
    z-index: -1;
    animation: drift 18s ease-in-out infinite alternate;
}
.bg-blob--1 { width: 600px; height: 600px; background: var(--accent); top: -220px; left: -160px; }
.bg-blob--2 { width: 520px; height: 520px; background: var(--accent-2); bottom: -220px; right: -120px; animation-delay: -9s; }

@keyframes drift {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(60px, 40px) scale(1.15); }
}

.topbar { padding: 56px 24px 24px; text-align: center; }
.topbar h1 { font-family: 'Space Grotesk', sans-serif; font-size: clamp(28px, 5vw, 44px); margin: 0 0 8px; }
.topbar-subtitle { color: var(--text-dim); margin: 0; }

.tabs { display: flex; justify-content: center; gap: 8px; margin: 24px auto 20px; }
.tabs[hidden] { display: none; }
.tab-btn {
    background: none;
    border: 1px solid var(--card-border);
    color: var(--text-dim);
    padding: 8px 18px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
    transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.tab-btn.is-active { color: var(--text); border-color: var(--accent); background: rgba(124, 92, 255, 0.12); }
.tab-btn:hover { color: var(--text); }

.status-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 999px;
    margin-top: 8px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-dim);
}
.status-badge.paid-off { background: rgba(34, 211, 165, 0.15); color: var(--accent-2); }
.status-badge.suspended { background: rgba(255, 209, 102, 0.15); color: #ffd166; }

.archived-notice {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 28px;
    margin-bottom: 32px;
    text-align: center;
    color: var(--text-dim);
}

.plan-actions { display: flex; gap: 12px; margin-top: -8px; margin-bottom: 32px; }
.plan-actions[hidden] { display: none; }
.plan-actions .btn-ghost, .plan-actions .btn-danger { flex: 1; }

.btn-danger {
    background: none;
    border: 1px solid rgba(255, 92, 92, 0.4);
    color: var(--danger);
    border-radius: 14px;
    padding: 14px 20px;
    cursor: pointer;
    font-family: inherit;
    font-size: 15px;
    transition: background 0.15s ease;
}
.btn-danger:hover { background: rgba(255, 92, 92, 0.1); }

.pin-gate { max-width: 320px; margin: 40px auto 0; text-align: center; }
.pin-gate form { display: flex; flex-direction: column; gap: 16px; }
.pin-gate input {
    text-align: center;
    font-size: 24px;
    letter-spacing: 0.3em;
    font-family: 'JetBrains Mono', monospace;
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px 64px;
}
.plans-grid[hidden] { display: none; }

.plan-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 24px;
    text-align: left;
    cursor: pointer;
    backdrop-filter: blur(16px);
    transition: transform 0.2s ease, border-color 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 16px;
    color: inherit;
    font: inherit;
    animation: pop-in 0.35s ease;
}
.plan-card:hover { transform: translateY(-4px); border-color: var(--accent); }

.plan-card-top h3 { margin: 0 0 4px; font-family: 'Space Grotesk', sans-serif; font-size: 20px; }
.plan-card-with { color: var(--text-dim); font-size: 14px; }

.plan-card-bottom { display: flex; justify-content: space-between; align-items: baseline; font-family: 'JetBrains Mono', monospace; }
.plan-card-remaining { font-size: 20px; font-weight: 700; color: var(--accent-2); }
.plan-card-total { color: var(--text-dim); font-size: 13px; }

.plan-card--add { align-items: center; justify-content: center; border-style: dashed; color: var(--text-dim); gap: 8px; }
.plan-card--add .plus { font-size: 32px; line-height: 1; }
.plan-card--add:hover { color: var(--text); }

.progress-track { height: 10px; border-radius: 999px; background: rgba(255, 255, 255, 0.08); overflow: hidden; }
.progress-track.small { height: 8px; }
.progress-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    width: 0%;
    transition: width 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.view { max-width: 720px; margin: 0 auto; padding: 32px 24px 80px; }

.back-btn { background: none; border: none; color: var(--text-dim); font-size: 14px; cursor: pointer; padding: 8px 0; margin-bottom: 8px; }
.back-btn:hover { color: var(--text); }

.detail-header h1 { font-family: 'Space Grotesk', sans-serif; font-size: clamp(24px, 4vw, 34px); margin: 0 0 4px; }
.detail-subtitle { color: var(--text-dim); margin: 0 0 24px; }

.hero-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 32px;
    backdrop-filter: blur(16px);
    margin-bottom: 32px;
}
.hero-remaining { display: flex; flex-direction: column; gap: 4px; margin-bottom: 20px; }
.hero-label { color: var(--text-dim); font-size: 14px; text-transform: uppercase; letter-spacing: 0.08em; }
.hero-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: clamp(40px, 8vw, 64px);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    display: inline-block;
}
.hero-number.pulse { animation: pulse 0.5s ease; }
@keyframes pulse {
    0% { transform: scale(1); }
    30% { transform: scale(1.08); }
    100% { transform: scale(1); }
}

.stat-row { display: flex; justify-content: space-between; margin-top: 20px; gap: 12px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-label { color: var(--text-dim); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.stat-value { font-family: 'JetBrains Mono', monospace; font-size: 18px; font-weight: 600; }

.payment-form, .history {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 28px;
    margin-bottom: 32px;
    backdrop-filter: blur(16px);
}
.payment-form h2, .history h2 { font-family: 'Space Grotesk', sans-serif; font-size: 18px; margin: 0 0 16px; }

.form-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 0; }
.form-row label { flex: 1; min-width: 160px; }

label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-dim); margin-bottom: 16px; }

input, textarea {
    font-family: inherit;
    font-size: 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 12px 14px;
    color: var(--text);
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #08090d;
    font-weight: 700;
    border: none;
    border-radius: 14px;
    padding: 14px 20px;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    transition: transform 0.15s ease;
}
.btn-primary:hover { transform: scale(1.02); }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost {
    background: none;
    border: 1px solid var(--card-border);
    color: var(--text);
    border-radius: 14px;
    padding: 14px 20px;
    cursor: pointer;
}

.payment-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.payment-row {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    animation: pop-in 0.3s ease;
}
@keyframes pop-in {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}
.payment-row-main { display: flex; flex-direction: column; }
.payment-amount { font-family: 'JetBrains Mono', monospace; font-weight: 700; color: var(--accent-2); }
.payment-date { color: var(--text-dim); font-size: 13px; }
.payment-note { color: var(--text-dim); font-size: 13px; flex: 1; padding: 0 8px; }
.payment-delete { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 16px; padding: 4px 8px; }
.payment-delete:hover { color: var(--danger); }

.empty-state { text-align: center; color: var(--text-dim); padding: 40px 0; }

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(5, 6, 10, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 50;
}
.modal-overlay[hidden] { display: none; }
.modal {
    background: var(--bg-2);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 28px;
    max-width: 420px;
    width: 100%;
}
.modal h2 { font-family: 'Space Grotesk', sans-serif; margin: 0 0 16px; }
.modal-actions { display: flex; gap: 12px; margin-top: 8px; }
.modal-actions .btn-primary, .modal-actions .btn-ghost { width: auto; flex: 1; }

.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translate(-50%, 20px);
    background: var(--bg-2);
    border: 1px solid var(--card-border);
    color: var(--text);
    padding: 14px 20px;
    border-radius: 14px;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 60;
    max-width: 90vw;
    text-align: center;
}
.toast--visible { opacity: 1; transform: translate(-50%, 0); }
.toast--error { border-color: var(--danger); }

#confetti-canvas {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 100;
}

@media (max-width: 480px) {
    .form-row { flex-direction: column; }
    .form-row label { margin-bottom: 16px; }
    .form-row label:last-child { margin-bottom: 0; }
}