/* ════════════════════════════════════════════════════
   ExpenseIQ — CSS
   Aesthetic: Dark fintech / Bloomberg-meets-modern-app
   Fonts: Syne (display), DM Sans (body), DM Mono (numbers)
════════════════════════════════════════════════════ */

/* ── VARIABLES ──────────────────────────────────── */
:root {
    --bg-base:        #0a0c10;
    --bg-panel:       #111318;
    --bg-panel-hover: #161920;
    --bg-input:       #0e1016;
    --bg-card:        #13161d;

    --border:         #1e2330;
    --border-light:   #252b3b;

    --text-primary:   #e8eaf0;
    --text-secondary: #7a8099;
    --text-muted:     #3d4358;

    --accent:         #0cebeb;
    --accent-dim:     rgba(12, 235, 235, 0.12);
    --accent-hover:   #20e3b2;

    --red:            #ff4d6a;
    --red-dim:        rgba(255, 77, 106, 0.1);
    --yellow:         #f5c842;
    --blue:           #4d9fff;
    --purple:         #a06bff;
    --orange:         #ff8c4b;

    --radius:         12px;
    --radius-sm:      8px;
    --radius-lg:      16px;

    --shadow:         0 4px 24px rgba(0,0,0,0.4);
    --shadow-sm:      0 2px 8px rgba(0,0,0,0.3);

    --transition:     0.2s cubic-bezier(0.4, 0, 0.2, 1);

    --font-display:   'Syne', sans-serif;
    --font-body:      'DM Sans', sans-serif;
    --font-mono:      'DM Mono', monospace;
}

/* ── RESET ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    line-height: 1.6;
    /* Soft glowing aura matching dribbble background */
    background-image: 
        radial-gradient(circle at 10% 40%, rgba(38, 204, 219, 0.1), transparent 40%),
        radial-gradient(circle at 85% 60%, rgba(123, 62, 184, 0.1), transparent 45%);
    background-attachment: fixed;
}
input, select, button { font-family: inherit; }
button { cursor: pointer; border: none; background: none; }

/* ── HEADER ─────────────────────────────────────── */
.header {
    border-bottom: 1px solid var(--border);
    background: rgba(10, 12, 16, 0.9);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-icon {
    color: var(--accent);
    font-size: 22px;
    animation: pulse 3s ease infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.logo-text {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}
.header-meta {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.profile-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 2px solid var(--accent);
    box-shadow: 0 0 12px var(--accent-dim);
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.profile-avatar:hover {
    transform: scale(1.1);
    box-shadow: 0 0 16px rgba(12, 235, 235, 0.4);
}

/* ── MAIN ───────────────────────────────────────── */
.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px 64px;
}

/* ── STAT CARDS ─────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}
.stat-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: border-color var(--transition), transform var(--transition);
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
}
.stat-card--total {
    background: linear-gradient(-45deg, #2bc1c5, #0d6e75, #178b8f, #0cebeb);
    background-size: 400% 400%;
    animation: gradientShift 6s ease infinite;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: inset 0 2px 5px rgba(255, 255, 255, 0.3), 0 10px 24px rgba(13, 110, 117, 0.4);
    border-radius: 20px;
}
.stat-card--month {
    background: linear-gradient(-45deg, #4d9fff, #1a56a3, #3584d7, #4d9fff);
    background-size: 400% 400%;
    animation: gradientShift 6s ease infinite;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: inset 0 2px 5px rgba(255, 255, 255, 0.3), 0 10px 24px rgba(26, 86, 163, 0.4);
    border-radius: 20px;
}
.stat-card--top {
    background: linear-gradient(-45deg, #a06bff, #4b2691, #7d44d1, #a06bff);
    background-size: 400% 400%;
    animation: gradientShift 6s ease infinite;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: inset 0 2px 5px rgba(255, 255, 255, 0.3), 0 10px 24px rgba(75, 38, 145, 0.4);
    border-radius: 20px;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.stat-card .stat-label { color: rgba(255, 255, 255, 0.85); }
.stat-card .stat-value { color: #ffffff; }
.stat-card .stat-sub { color: rgba(255, 255, 255, 0.7); }

.stat-card--total::before { background: linear-gradient(90deg, rgba(255,255,255,0.7), transparent); }
.stat-card--month::before { background: linear-gradient(90deg, rgba(255,255,255,0.7), transparent); }
.stat-card--top::before   { background: linear-gradient(90deg, rgba(255,255,255,0.7), transparent); }

.stat-card:hover { border-color: rgba(255, 255, 255, 0.4); transform: translateY(-4px); }
.stat-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 12px;
}
.stat-value {
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -1px;
    line-height: 1.1;
}
.stat-value--sm { font-size: 20px; }
.stat-sub {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
    font-family: var(--font-mono);
}

/* ── CONTENT GRID ───────────────────────────────── */
.content-grid {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 20px;
    align-items: start;
}

/* ── PANELS ─────────────────────────────────────── */
.panel {
    background: rgba(17, 19, 24, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    overflow: hidden;
}
.panel-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
.panel-title {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}
.panel-badge {
    background: var(--accent-dim);
    color: var(--accent);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 100px;
    border: 1px solid rgba(0,229,160,0.2);
}

/* ── FORM ───────────────────────────────────────── */
.expense-form {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}
.field-group {
    margin-bottom: 16px;
}
.field-label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 7px;
}
.field-input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
    -webkit-appearance: none;
}
.field-input::placeholder { color: var(--text-muted); }
.field-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}
.field-input:hover:not(:focus) { border-color: var(--border-light); }

/* Number input arrows hide */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; }
input[type=date]::-webkit-calendar-picker-indicator {
    filter: invert(0.5);
    cursor: pointer;
}

.input-prefix-wrap { position: relative; }
.input-prefix {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 14px;
    pointer-events: none;
    z-index: 1;
}
.field-input--prefixed { padding-left: 28px; }

.select-wrap { position: relative; }
.field-select { cursor: pointer; padding-right: 36px; }
.field-select option { background: #111318; }
.select-arrow {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
    font-size: 12px;
}
.select-wrap--sm .field-select--sm {
    padding: 7px 32px 7px 12px;
    font-size: 13px;
}

.field-error {
    display: block;
    font-size: 11px;
    color: var(--red);
    margin-top: 4px;
    min-height: 16px;
}

.btn-submit {
    width: 100%;
    background: linear-gradient(135deg, #2bc1c5 0%, #0d6e75 100%);
    color: #fff;
    border-radius: var(--radius-sm);
    padding: 12px 20px;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    transition: background var(--transition), transform var(--transition), opacity var(--transition);
}
.btn-submit:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-submit:active { transform: translateY(0); }
.btn-submit:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-icon {
    font-size: 20px;
    font-weight: 300;
    line-height: 1;
}

.form-feedback {
    margin-top: 10px;
    font-size: 12px;
    text-align: center;
    min-height: 18px;
}
.form-feedback.success { color: var(--accent); }
.form-feedback.error   { color: var(--red); }

/* ── BREAKDOWN PANEL ────────────────────────────── */
.breakdown-panel {
    padding: 20px 24px;
}
.breakdown-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 14px;
}
.breakdown-list { display: flex; flex-direction: column; gap: 10px; }
.breakdown-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.breakdown-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.breakdown-name {
    font-size: 13px;
    color: var(--text-primary);
}
.breakdown-amount {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
}
.breakdown-bar-track {
    height: 3px;
    background: var(--border);
    border-radius: 100px;
    overflow: hidden;
}
.breakdown-bar-fill {
    height: 100%;
    border-radius: 100px;
    background: var(--accent);
    transition: width 0.5s ease;
}
.empty-breakdown {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
    padding: 12px 0;
}

/* ── FILTER ROW ─────────────────────────────────── */
.filter-row {
    display: flex;
    align-items: center;
    gap: 10px;
}
.btn-clear {
    font-size: 12px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 7px 12px;
    background: transparent;
    transition: all var(--transition);
}
.btn-clear:hover { border-color: var(--red); color: var(--red); }

/* ── EXPENSE LIST ───────────────────────────────── */
.expense-list {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 680px;
    overflow-y: auto;
}
.expense-list::-webkit-scrollbar { width: 4px; }
.expense-list::-webkit-scrollbar-track { background: transparent; }
.expense-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── EXPENSE CARD ───────────────────────────────── */
.expense-card {
    background: rgba(19, 22, 29, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    padding: 16px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 14px;
    align-items: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: slideIn 0.25s ease forwards;
}
@keyframes slideIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
.expense-card:hover { 
    background: rgba(30, 35, 45, 0.9);
    border-color: rgba(43, 193, 197, 0.3); 
    transform: translateY(-4px) scale(1.02); 
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
}
.expense-card.removing {
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.3s ease;
}

.card-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}
.card-body { min-width: 0; }
.card-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 3px;
}
.card-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.card-category {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    padding: 2px 8px;
    border-radius: 100px;
    background: var(--border);
    color: var(--text-secondary);
}
.card-date {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
}
.card-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    flex-shrink: 0;
}
.card-amount {
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}
.btn-delete {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all var(--transition);
}
.btn-delete:hover {
    background: var(--red-dim);
    border-color: var(--red);
    color: var(--red);
}

/* Category color dots */
.dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.dot--Food         { background: var(--yellow); }
.dot--Transport    { background: var(--blue); }
.dot--Shopping     { background: var(--purple); }
.dot--Health       { background: #ff6b9d; }
.dot--Entertainment{ background: var(--orange); }
.dot--Education    { background: #4dd8e0; }
.dot--Utilities    { background: #a0c4ff; }
.dot--Travel       { background: var(--accent); }
.dot--Other        { background: var(--text-muted); }

/* ── LOADING & EMPTY STATES ─────────────────────── */
.loading-state, .empty-state {
    text-align: center;
    padding: 60px 24px;
    color: var(--text-secondary);
}
.spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.empty-icon { font-size: 36px; color: var(--text-muted); margin-bottom: 12px; }
.empty-title { font-family: var(--font-display); font-size: 16px; font-weight: 600; color: var(--text-secondary); }
.empty-sub { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* ── MODAL ──────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.15s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 360px;
    width: calc(100% - 48px);
    text-align: center;
    animation: scaleIn 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes scaleIn { from { transform: scale(0.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-icon { font-size: 28px; color: var(--yellow); margin-bottom: 12px; }
.modal-title { font-family: var(--font-display); font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.modal-body  { font-size: 14px; color: var(--text-secondary); margin-bottom: 24px; }
.modal-actions { display: flex; gap: 10px; justify-content: center; }
.btn-cancel {
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all var(--transition);
}
.btn-cancel:hover { border-color: var(--border-light); color: var(--text-primary); }
.btn-delete-confirm {
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    background: var(--red);
    color: #fff;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    transition: all var(--transition);
}
.btn-delete-confirm:hover { opacity: 0.85; }

/* ── TOAST ──────────────────────────────────────── */
.toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    font-size: 13px;
    padding: 10px 20px;
    border-radius: 100px;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 300;
    white-space: nowrap;
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.toast.toast--success { border-color: rgba(0,229,160,0.4); color: var(--accent); }
.toast.toast--error   { border-color: rgba(255,77,106,0.4); color: var(--red); }

/* ── RESPONSIVE ─────────────────────────────────── */
@media (max-width: 900px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .stat-card--top { display: none; }
}
@media (max-width: 600px) {
    .main { padding: 20px 16px 48px; }
    .stats-grid { grid-template-columns: 1fr; }
    .stat-card--month { display: none; }
    .expense-card { grid-template-columns: auto 1fr; }
    .card-right { flex-direction: row; align-items: center; }
}