/* ============================================
   SplitEase — Custom Stylesheet
   ============================================ */

:root {
    --accent: #2997ff;
    --accent-light: #8bc7ff;
    --accent-dark: #0f5aa8;
    --accent-glow: rgba(41, 151, 255, 0.22);
    --glass-bg: rgba(18, 18, 20, 0.72);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-hover: rgba(255, 255, 255, 0.03);
    --surface: #0b0b0d;
    --surface-2: #141417;
    --text-primary: #f5f5f7;
    --text-secondary: #9b9ba3;
    --success: #32d074;
    --danger: #ff453a;
    --warning: #ff9f0a;
    --radius: 16px;
    --radius-sm: 10px;
}

* { box-sizing: border-box; }

body {
    font-family: 'Inter', sans-serif;
    background:
        radial-gradient(1200px 600px at 20% -10%, rgba(255, 255, 255, 0.05), transparent 60%),
        radial-gradient(900px 500px at 90% 0%, rgba(255, 255, 255, 0.04), transparent 55%),
        var(--surface);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* --- Animated Background Orbs --- */
.bg-orbs {
    position: fixed; inset: 0;
    z-index: -1; overflow: hidden;
    pointer-events: none;
}
.orb {
    position: absolute; border-radius: 50%;
    filter: blur(140px); opacity: 0.18;
    animation: float 20s ease-in-out infinite;
}
.orb-1 {
    width: 500px; height: 500px;
    background: #1c1f26;
    top: -10%; left: -5%;
    animation-duration: 22s;
}
.orb-2 {
    width: 400px; height: 400px;
    background: #15171c;
    bottom: -10%; right: -5%;
    animation-duration: 18s;
    animation-delay: -5s;
}
.orb-3 {
    width: 350px; height: 350px;
    background: #0f1a24;
    top: 40%; left: 50%;
    animation-duration: 25s;
    animation-delay: -10s;
}
@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(40px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 40px) scale(0.95); }
    75% { transform: translate(30px, 20px) scale(1.02); }
}

/* --- Utility --- */
.text-accent { color: var(--accent-light) !important; }

/* --- Glass Nav --- */
.glass-nav {
    background: rgba(12, 12, 14, 0.82);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.6rem 0;
}
.brand-icon {
    width: 40px; height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; color: #fff;
}
.brand-text {
    font-weight: 800; font-size: 1.4rem;
    letter-spacing: -0.5px;
}

/* --- Hero --- */
.hero-section { padding: 3rem 0 1.5rem; }
.hero-title {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800; letter-spacing: -1px;
    margin-bottom: 0.5rem;
}
.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem; max-width: 500px;
    margin: 0 auto;
}

/* --- Sections --- */
.content-section { margin-top: 2.5rem; }
.section-header {
    display: flex; align-items: flex-start; gap: 1rem;
    margin-bottom: 1.2rem;
}
.step-badge {
    flex-shrink: 0;
    width: 36px; height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.95rem; color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
}
.section-title {
    font-size: 1.4rem; font-weight: 700;
    margin-bottom: 0.1rem;
}
.section-desc {
    color: var(--text-secondary);
    font-size: 0.9rem; margin-bottom: 0;
}

/* --- Glass Card --- */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: border-color 0.3s;
}
.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
}

/* --- Inputs --- */
.custom-input-group .input-group-text {
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    color: var(--accent-light);
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}
.custom-input-group .form-control {
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.custom-input {
    background: var(--surface-2) !important;
    border: 1px solid var(--glass-border) !important;
    color: var(--text-primary) !important;
    border-radius: var(--radius-sm) !important;
    transition: border-color 0.25s, box-shadow 0.25s;
}
.custom-input:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 2px var(--accent-glow) !important;
}

/* --- Accent Button --- */
.btn-accent {
    background: linear-gradient(180deg, #2a8cff, var(--accent-dark));
    color: #fff; border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    box-shadow: 0 6px 18px rgba(41, 151, 255, 0.18);
    transition: transform 0.2s, box-shadow 0.2s;
}
.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(41, 151, 255, 0.22);
    color: #fff;
}
.btn-accent:active { transform: translateY(0); }
.btn-accent:disabled {
    opacity: 0.5;
    transform: none;
    box-shadow: none;
}

/* --- Participant Chips --- */
.participants-chips {
    display: flex; flex-wrap: wrap; gap: 0.5rem;
}
.participant-chip {
    display: inline-flex; align-items: center; gap: 0.4rem;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    border-radius: 50px; padding: 0.35rem 0.6rem 0.35rem 0.85rem;
    font-size: 0.85rem; font-weight: 500;
    animation: chipIn 0.3s ease;
}
.participant-chip .chip-remove {
    background: none; border: none; color: var(--danger);
    cursor: pointer; font-size: 1rem; line-height: 1;
    padding: 0 0.15rem; border-radius: 50%;
    transition: background 0.2s;
}
.participant-chip .chip-remove:hover {
    background: rgba(255, 69, 58, 0.15);
}
@keyframes chipIn {
    from { opacity: 0; transform: scale(0.85); }
    to { opacity: 1; transform: scale(1); }
}

/* --- Split Between Container --- */
.split-between-container {
    max-height: 140px; overflow-y: auto;
    display: flex; flex-wrap: wrap; gap: 0.4rem;
    border-radius: var(--radius-sm);
}
.split-between-container .form-check {
    margin: 0;
}
.split-between-container .form-check-label {
    font-size: 0.85rem;
    cursor: pointer;
    padding: 0.25rem 0.6rem;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
    transition: all 0.2s;
    user-select: none;
}
.split-between-container .form-check-input {
    display: none;
}
.split-between-container .form-check-input:checked + .form-check-label {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    font-weight: 600;
}

/* --- Payer Amount Rows --- */
.payer-amount-row {
    display: flex; align-items: center; gap: 0.6rem;
    padding: 0.45rem 0.7rem;
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    margin-bottom: 0.4rem;
    animation: chipIn 0.3s ease;
}
.payer-amount-row .payer-name {
    font-weight: 600; font-size: 0.85rem;
    min-width: 70px;
}
.payer-amount-row input {
    background: var(--surface) !important;
    border: 1px solid var(--glass-border) !important;
    color: var(--text-primary) !important;
    border-radius: 6px !important;
    padding: 0.25rem 0.5rem;
    font-size: 0.85rem;
    width: 110px;
    transition: border-color 0.25s, box-shadow 0.25s;
}
.payer-amount-row input:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 2px var(--accent-glow) !important;
    outline: none;
}
.payer-amounts-total {
    font-size: 0.8rem;
    padding: 0.3rem 0.5rem;
    border-radius: 6px;
    margin-top: 0.3rem;
}
.payer-amounts-total.match { color: var(--success); }
.payer-amounts-total.mismatch { color: var(--danger); }

/* --- Table --- */
.custom-table {
    --bs-table-bg: transparent;
    --bs-table-hover-bg: var(--glass-hover);
    color: var(--text-primary);
    border-color: var(--glass-border);
}
.custom-table thead th {
    background: var(--surface-2);
    border-bottom: 2px solid var(--accent);
    font-weight: 600; font-size: 0.8rem;
    text-transform: uppercase; letter-spacing: 0.5px;
    color: var(--text-secondary);
    padding: 0.75rem 1rem;
}
.custom-table tbody td {
    padding: 0.75rem 1rem;
    border-color: var(--glass-border);
    vertical-align: middle;
}
.custom-table tbody tr {
    transition: background 0.2s;
}
.split-badges { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.split-badge {
    font-size: 0.75rem;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    border-radius: 50px; padding: 0.15rem 0.55rem;
    color: var(--text-secondary);
}
.payer-badge {
    background: rgba(41, 151, 255, 0.12);
    border-color: rgba(41, 151, 255, 0.28);
    color: var(--accent-light);
}

/* --- Empty State --- */
.empty-state {
    text-align: center; padding: 2rem 1rem;
    color: var(--text-secondary);
}
.empty-state i { font-size: 2.5rem; margin-bottom: 0.5rem; display: block; opacity: 0.4; }
.small-empty { padding: 1.5rem 0.5rem; }
.small-empty i { font-size: 2rem; }

/* --- Balance Items --- */
.balance-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    animation: slideUp 0.35s ease;
}
.balance-item .name { font-weight: 600; font-size: 0.9rem; }
.balance-positive { color: var(--success); }
.balance-negative { color: var(--danger); }

/* --- Settlement Cards --- */
.settlement-card {
    display: flex; align-items: center; gap: 1rem;
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.6rem;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    animation: slideUp 0.35s ease;
}
.settlement-card .arrow {
    font-size: 1.3rem;
    color: var(--accent-light);
    flex-shrink: 0;
}
.settlement-card .person { font-weight: 600; font-size: 0.95rem; white-space: nowrap; }
.settlement-card .amount {
    margin-left: auto;
    font-weight: 700; font-size: 1.05rem;
    color: var(--warning);
    white-space: nowrap;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Card Section Title --- */
.card-section-title {
    font-size: 1rem; font-weight: 700;
    margin-bottom: 1rem; padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--glass-border);
}

/* --- Toast --- */
.custom-toast {
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(41, 151, 255, 0.28);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(41, 151, 255, 0.5); }

/* --- Self Spending Items --- */
.self-spending-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    background: var(--surface-2);
    border: 1px solid var(--glass-border);
    animation: slideUp 0.35s ease;
}
.self-spending-item .name { font-weight: 600; font-size: 0.9rem; }
.self-spending-item .spending-amount {
    font-weight: 700; font-size: 0.95rem;
    color: var(--warning);
}
.self-spending-bar {
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-dark));
    margin-top: 0.35rem;
    transition: width 0.6s ease;
}

/* --- Action Buttons Group --- */
.action-btns { display: flex; gap: 0.35rem; justify-content: center; }
.btn-edit {
    color: var(--accent-light);
    border-color: rgba(41, 151, 255, 0.28);
}
.btn-edit:hover {
    background: rgba(41, 151, 255, 0.14);
    color: var(--accent-light);
    border-color: var(--accent);
}

/* --- Edit Mode --- */
.glass-card.edit-mode {
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow), 0 0 60px rgba(41, 151, 255, 0.08);
}

/* --- Responsive --- */
@media (max-width: 576px) {
    .glass-card { padding: 1rem; }
    .hero-title { font-size: 1.8rem; }
    .hero-subtitle { font-size: 0.95rem; }
    .settlement-card { flex-wrap: wrap; gap: 0.5rem; }
    .settlement-card .amount { margin-left: 0; }
}