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

/* ==========================================================================
   1. VARIABLES (LIGHT & DARK MODE)
   ========================================================================== */
:root {
    --bg-body: #b0b9ca;
    --glass-bg: rgba(255, 255, 255, 0.3);
    --nav-bg: #c8c9d7b3;
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --text-main: #1f2937;
    --text-muted: #4b5563;
    --input-bg: rgba(255, 255, 255, 0.4);
    --input-border: #d1d5db;
    --input-focus-ring: #64748b;
    --btn-bg: rgba(255, 255, 255, 0.3);
    --btn-border: rgba(255, 255, 255, 0.4);
    --btn-hover: rgba(255, 255, 255, 0.5);
    --link-color: #2563eb;
    --danger-color: #ef4444;
    --success-color: #046545;
}

:root[data-theme="dark"] {
    color-scheme: dark; /* Forces Chrome calendar icons to turn white! */
    --bg-body: #111827;
    --glass-bg: rgba(87, 92, 103, 0.3);
    --nav-bg: #3f4551cc; 
    --glass-border: rgba(55, 65, 81, 1);
    --glass-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --input-bg: rgba(0, 0, 0, 0.2);
    --input-border: #4b5563;
    --input-focus-ring: #bfdbfe;
    --btn-bg: rgba(255, 255, 255, 0.1);
    --btn-border: rgba(255, 255, 255, 0.2);
    --btn-hover: rgba(255, 255, 255, 0.15);
    --link-color: #60a5fa;
    --danger-color: #dd1a1a;
    --success-color: #10b981;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark; /* Forces Chrome calendar icons to turn white! */
        --bg-body: #111827;
        --glass-bg: rgba(87, 92, 103, 0.3);
        --nav-bg: #3f4551cc; 
        --glass-border: rgba(55, 65, 81, 1);
        --glass-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
        --text-main: #f3f4f6;
        --text-muted: #9ca3af;
        --input-bg: rgba(0, 0, 0, 0.2);
        --input-border: #4b5563;
        --input-focus-ring: #bfdbfe;
        --btn-bg: rgba(255, 255, 255, 0.1);
        --btn-border: rgba(255, 255, 255, 0.2);
        --btn-hover: rgba(255, 255, 255, 0.15);
        --link-color: #60a5fa;
        --danger-color: #dd1a1a;
        --success-color: #10b981;
    }
}

/* ==========================================================================
   2. BASE & UTILITIES
   ========================================================================== */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(115deg, var(--bg-body) 0%, rgb(80 91 108 / 68%) 100%);
}

.text-center { text-align: center; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-6 { margin-top: 1.5rem; }
.title { font-size: 1.875rem; font-weight: 700; margin: 0; }
.subtitle { font-size: 0.875rem; font-weight: 600; color: var(--text-muted); }
.text-danger { color: var(--danger-color) !important; }
.text-success { color: var(--success-color) !important; }

/* --- RESPONSIVE DISPLAY CLASSES --- */
.desktop-only { display: block; }
.desktop-flex { display: flex; }
.mobile-only { display: none; }

/* Personal Tab Table breaks at 900px */
@media (max-width: 900px) {
    .desktop-only { display: none !important; }
    .desktop-flex { display: none !important; }
    .mobile-only { display: block !important; }
}

/* Ledger Tab Arrows break at 600px */
.ledger-desktop { display: flex; }
.ledger-mobile { display: none; }
@media (max-width: 600px) {
    .ledger-desktop { display: none !important; }
    .ledger-mobile { display: block !important; }
}

/* ==========================================================================
   3. GLASS COMPONENTS (Cards, Inputs, Buttons)
   ========================================================================== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    box-shadow: var(--glass-shadow);
    padding: 2rem;
}

.form-group { margin-bottom: 1rem; }
.form-label { display: block; font-size: 0.75rem; font-weight: 600; margin-bottom: 0.25rem; color: var(--text-muted); }

.glass-input {
    width: 100%; padding: 0.75rem 1rem; border-radius: 0.75rem;
    background: var(--input-bg); border: 1px solid var(--input-border);
    color: var(--text-main); font-family: inherit; transition: all 0.2s ease;
}
.glass-input:focus { outline: none; border-color: transparent; box-shadow: 0 0 0 2px var(--input-focus-ring); }

.glass-btn {
    width: 100%; padding: 0.75rem; background: var(--btn-bg);
    backdrop-filter: blur(24px); border: 1px solid var(--btn-border);
    color: var(--text-main); font-weight: 700; border-radius: 0.75rem;
    cursor: pointer; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1); transition: all 0.2s ease;
}
.glass-btn:hover:not(:disabled) { transform: scale(1.02); background: var(--btn-hover); }
.glass-btn:disabled { opacity: 0.5; cursor: not-allowed; }

a.glass-link { color: var(--link-color); text-decoration: none; }
a.glass-link:hover { text-decoration: underline; }

.icon-btn {
    background: transparent; border: none; color: var(--text-main);
    cursor: pointer; padding: 0.5rem; border-radius: 50%;
    display: flex; align-items: center; justify-content: center; transition: background 0.2s;
}
.icon-btn:hover { background: var(--btn-bg); }

/* ==========================================================================
   4. APP SHELL & NAVIGATION
   ========================================================================== */
.app-wrapper {
    display: flex; flex-direction: column; height: 100vh; width: 100vw; overflow: hidden;
}


.top-navbar {
    position: relative; 
    display: flex; align-items: center; justify-content: space-between;
    height: 72px; padding: 0 2rem; 
    background: var(--nav-bg); /* <-- THE FIX: Now completely decoupled from cards */
    backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--glass-border); flex-shrink: 0;
    z-index: 2000; 
}
/* Centered Tabs */
.nav-links {
    position: absolute; left: 50%; transform: translateX(-50%);
    display: flex; gap: 1rem; align-items: center;
}

.nav-link {
    display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1rem;
    border-radius: 0.75rem; color: var(--text-muted); text-decoration: none;
    font-weight: 600; transition: all 0.2s ease;
}
.nav-link:hover, .nav-link.active { background: var(--btn-bg); color: var(--text-main); }

.nav-actions { display: flex; gap: 1rem; align-items: center; }

/* Profile Dropdown */
.profile-dropdown-container { position: relative; }
.profile-menu {
    position: absolute;
    top: 120%;
    right: 0;
    width: 220px;
    background: rgb(47 51 61 / 93%);
    backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    box-shadow: var(--glass-shadow);
    overflow: hidden;
    display: none;
    flex-direction: column;
    z-index: 100;
}

.profile-menu.active { display: flex; }
.profile-menu-item {
    padding: 0.75rem 1rem; color: var(--text-main); text-decoration: none;
    font-weight: 600; font-size: 0.9rem; transition: background 0.2s;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}
.profile-menu-item:last-child { border-bottom: none; }
.profile-menu-item:hover { background: var(--btn-bg); }

.main-content { flex: 1; padding: 2rem; overflow-y: auto; }
.top-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }

.bottom-nav {
    display: none; position: fixed; bottom: 0; left: 0; width: 100%;
    background: var(--glass-bg); backdrop-filter: blur(24px);
    border-top: 1px solid var(--glass-border); padding: 0.5rem; justify-content: space-around; z-index: 50;
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .bottom-nav { display: flex; }
    .main-content { padding: 1rem; padding-bottom: 5rem; }
    .top-navbar { padding: 0 1rem; }
}

/* ==========================================================================
   5. MODALS & DIALOGS
   ========================================================================== */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0, 0, 0, 0.4); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000; opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }

.modal-content {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: 1.5rem; box-shadow: var(--glass-shadow);
    width: 90%; max-width: 32rem; max-height: 90vh; overflow-y: auto;
    padding: 2rem; transform: translateY(20px); transition: transform 0.3s ease;
}
.modal-overlay.active .modal-content { transform: translateY(0); }

.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }

.detail-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 1rem; margin-bottom: 1rem; }
.detail-label { font-weight: 700; color: var(--text-muted); font-size: 0.85rem; }
.detail-value { font-weight: 600; color: var(--text-main); word-wrap: break-word; }

/* ==========================================================================
   6. TABLES & FULLSCREEN
   ========================================================================== */
.glass-table-wrapper {
    width: 100%; overflow-x: auto; background: var(--glass-bg);
    border: 1px solid var(--glass-border); border-radius: 1rem;
    backdrop-filter: blur(24px); box-shadow: var(--glass-shadow); transition: all 0.3s ease;
}

/* FULLSCREEN TABLE MODE */
.glass-table-wrapper.is-fullscreen {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: 2000;
    border-radius: 0;
    padding: 2rem;
    
    /* THE FIX: Re-apply the global gradient so it matches perfectly, 
       then add a blur to keep it highly legible! */
    background: linear-gradient(115deg, var(--bg-body) 0%, rgb(80 91 108 / 68%) 100%);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
}

.table-header-controls {
    display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.glass-table { width: 100%; border-collapse: collapse; white-space: nowrap; }
.glass-table th, .glass-table td { padding: 1rem 1.5rem; text-align: left; border-bottom: 1px solid var(--glass-border); }
.glass-table th { font-weight: 700; color: var(--text-muted); cursor: pointer; user-select: none; transition: background 0.2s; }
.glass-table th:hover { color: var(--text-main); background: rgba(0,0,0,0.05); }
.glass-table tbody tr { transition: background 0.2s; cursor: pointer; }
.glass-table tbody tr:hover { background: rgba(100,116,139,0.1); }

.glass-table th.col-medium, .glass-table td.col-medium { width: 80px; }
.glass-table th.col-reimb, .glass-table td.col-reimb { width: 100px; text-align: center; }
.glass-table th.col-amount, .glass-table td.col-amount { width: 120px; }
.glass-table th.col-remark, .glass-table td.col-remark,
.glass-table th.col-notes, .glass-table td.col-notes {
    max-width: 250px; white-space: normal; word-wrap: break-word;
}

/* ==========================================================================
   7. LEDGER & NETWORK SPECIFIC STYLES
   ========================================================================== */
.ledger-visual-row {
    align-items: center; justify-content: space-between; background: var(--glass-bg);
    border: 1px solid var(--glass-border); border-radius: 1.5rem; padding: 1.5rem 2rem;
    margin-bottom: 1.5rem; box-shadow: var(--glass-shadow); transition: transform 0.2s;
}
.ledger-visual-row:hover { transform: translateY(-3px); }

.ledger-party { display: flex; flex-direction: column; align-items: center; width: 120px; text-align: center; }
.ledger-avatar {
    width: 72px; height: 72px; border-radius: 50%; object-fit: cover;
    border: 3px solid var(--glass-border); background: var(--text-muted); color: white;
    display: flex; align-items: center; justify-content: center; font-size: 2rem; font-weight: bold;
    margin-bottom: 0.5rem; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
}

.ledger-transfer { flex: 1; display: flex; flex-direction: column; align-items: center; padding: 0 2rem; }
.ledger-arrow-container { display: flex; align-items: center; width: 100%; margin: 0.75rem 0; }
.ledger-line { flex: 1; height: 3px; background: var(--text-muted); opacity: 0.2; border-radius: 2px; }
.ledger-amount-pill {
    color: white; padding: 0.5rem 1.5rem; border-radius: 9999px; font-weight: 800; font-size: 1.25rem;
    margin: 0 0.5rem; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.2);
}
.ledger-amount-pill.sent { background: var(--danger-color); }
.ledger-amount-pill.received { background: var(--success-color); }
.ledger-arrow-head { color: var(--text-muted); opacity: 0.4; font-size: 1.5rem; margin-left: -0.25rem; }

/* Filter Bar & Tabs */
.filter-bar { display: flex; gap: 1rem; align-items: flex-end; flex-wrap: wrap; margin-bottom: 2rem; }
.tab-container { display: flex; gap: 1rem; margin-bottom: 1.5rem; border-bottom: 1px solid var(--glass-border); padding-bottom: 0.5rem; }
.tab-btn {
    background: transparent; border: none; color: var(--text-muted); font-size: 1.125rem;
    font-weight: 700; cursor: pointer; padding: 0.5rem 1rem; border-radius: 0.5rem; transition: all 0.2s ease;
}
.tab-btn:hover { color: var(--text-main); }
.tab-btn.active { color: var(--text-main); background: var(--glass-bg); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Segmented Control (Who Paid) */
.segmented-control {
    display: flex; gap: 0.5rem; background: var(--input-bg); border: 1px solid var(--input-border);
    padding: 0.25rem; border-radius: 0.75rem;
}
.segment-label {
    flex: 1; text-align: center; padding: 0.5rem; border-radius: 0.5rem;
    cursor: pointer; font-weight: 700; color: var(--text-muted); transition: all 0.2s ease;
}
.segment-label.active { background: var(--text-main); color: var(--bg-body); }
.segment-radio { display: none; }

/* Badges & Cards (Mobile) */
.badge {
    display: inline-block; padding: 0.25rem 0.75rem; border-radius: 9999px;
    font-size: 0.75rem; font-weight: 700; background: rgba(100, 116, 139, 0.2); color: var(--text-main);
}
.badge.reimbursable { background: rgba(245, 158, 11, 0.2); color: #f59e0b; }

.expense-card {
    display: flex; justify-content: space-between; align-items: center; padding: 1.25rem;
    margin-bottom: 1rem; background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: 1rem; transition: transform 0.2s;
}
.expense-card:hover { transform: translateY(-2px); }
.expense-details h4 { margin-bottom: 0.25rem; font-size: 1.125rem; }
.expense-meta { display: flex; gap: 0.5rem; align-items: center; margin-bottom: 0.5rem; flex-wrap: wrap;}
.expense-amount { font-size: 1.5rem; font-weight: 800; text-align: right; }
.expense-actions { display: flex; gap: 0.5rem; justify-content: flex-end; margin-top: 0.5rem; }

.contact-row {
    display: flex; align-items: center; gap: 1rem; padding: 1rem; background: var(--glass-bg);
    border: 1px solid var(--glass-border); border-radius: 1rem; margin-bottom: 0.75rem;
    cursor: pointer; transition: transform 0.2s;
}
.contact-row:hover { transform: translateY(-2px); }
.avatar {
    width: 48px; height: 48px; border-radius: 50%; background: var(--text-muted); color: white;
    display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 1.25rem;
}

/* --- INLINE TABLE EDITING (DESKTOP) --- */
.inline-input {
    width: 100%;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}
.inline-input:focus, .inline-input:hover {
    border-color: var(--input-border);
    outline: none;
}
select.inline-input {
    appearance: none;
    cursor: pointer;
}
.inline-row.saving { opacity: 0.6; pointer-events: none; }

/* --- GLOBAL ALERT & CONFIRM DIALOGS --- */
.custom-dialog-overlay {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    display: flex; align-items: center; justify-content: center;
    z-index: 9999; opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
}
.custom-dialog-overlay.active { opacity: 1; pointer-events: auto; }
.custom-dialog-box {
    background: var(--glass-bg); border: 1px solid var(--glass-border);
    border-radius: 1.5rem; padding: 2rem; width: 90%; max-width: 24rem;
    box-shadow: var(--glass-shadow); text-align: center;
    transform: scale(0.95); transition: transform 0.2s ease;
}
.custom-dialog-overlay.active .custom-dialog-box { transform: scale(1); }


/* --- TABLE ROW COUNTER --- */
.glass-table {
    counter-reset: row-num;
}
.glass-table tbody tr:not([data-id="new"]) td.row-index::before {
    counter-increment: row-num;
    content: counter(row-num);
}
.glass-table th.col-index, .glass-table td.row-index {
    width: 40px;
    text-align: center;
    color: var(--text-muted);
    font-weight: 700;
}

/* --- CUSTOM SELECT DROPDOWNS --- */
select.glass-input, select.inline-input {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
    padding-right: 2.5rem;
    cursor: pointer;
}

select.inline-input {
    background-position: right 0.5rem center;
    padding-right: 1.5rem;
}

/* Style the native dropdown popup */
select.glass-input option, select.inline-input option {
    background-color: var(--bg-body);
    color: var(--text-main);
    font-weight: 600;
}

/* Tighten the Admin Dashboard Select Radius */
select.admin-select {
    border-radius: 0.5rem;
    padding: 0.4rem 2.5rem 0.4rem 0.75rem;
    background-position: right 0.5rem center;
    font-size: 0.85rem;
}

/* Fix default arrow color for Light Mode */
select.glass-input, select.inline-input {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234b5563' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
}

/* Change arrow to light gray for manual Dark Mode */
:root[data-theme="dark"] select.glass-input, 
:root[data-theme="dark"] select.inline-input {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f3f4f6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
}

/* Change arrow to light gray for OS-level Dark Mode */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) select.glass-input, 
    :root:not([data-theme="light"]) select.inline-input {
        background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f3f4f6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    }
}