/* ===== FinanceFlow - Global Styles ===== */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --bg-card-hover: rgba(30, 41, 59, 0.9);
    --border-color: rgba(148, 163, 184, 0.1);
    --border-glow: rgba(148, 163, 184, 0.2);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --income-primary: #10b981;
    --income-light: #34d399;
    --income-bg: rgba(16, 185, 129, 0.1);
    --income-border: rgba(16, 185, 129, 0.3);
    --income-glow: rgba(16, 185, 129, 0.15);
    --expense-primary: #f43f5e;
    --expense-light: #fb7185;
    --expense-bg: rgba(244, 63, 94, 0.1);
    --expense-border: rgba(244, 63, 94, 0.3);
    --expense-glow: rgba(244, 63, 94, 0.15);
    --balance-primary: #6366f1;
    --balance-light: #818cf8;
    --balance-bg: rgba(99, 102, 241, 0.1);
    --balance-glow: rgba(99, 102, 241, 0.15);
    --count-primary: #f59e0b;
    --count-light: #fbbf24;
    --count-bg: rgba(245, 158, 11, 0.1);
    --count-glow: rgba(245, 158, 11, 0.15);
    --accent: #6366f1;
    --accent-light: #818cf8;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --shadow: 0 4px 32px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(16, 185, 129, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(244, 63, 94, 0.03) 0%, transparent 50%);
    z-index: 0;
    pointer-events: none;
}

/* ===== HEADER ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        filter: brightness(1);
        transform: scale(1);
    }

    50% {
        filter: brightness(1.3);
        transform: scale(1.1);
    }
}

.logo h1 {
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--income-light), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 12px;
    color: var(--text-muted);
    padding-left: 4px;
    border-left: 2px solid var(--border-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* NAV LINKS */
.nav-links {
    display: flex;
    gap: 4px;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    border: 1px solid transparent;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.08);
    border-color: var(--border-color);
}

.nav-link.active {
    color: var(--accent-light);
    background: rgba(99, 102, 241, 0.12);
    border-color: rgba(99, 102, 241, 0.25);
}

.nav-link-icon {
    font-size: 16px;
}

/* MONTH NAV */
.month-navigator {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 8px;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    padding: 4px 10px;
    border-radius: var(--radius-xs);
    transition: var(--transition);
    line-height: 1;
}

.nav-btn:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-light);
}

.month-label {
    font-size: 14px;
    font-weight: 600;
    min-width: 140px;
    text-align: center;
}

.header-actions {
    display: flex;
    gap: 8px;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-icon {
    font-size: 15px;
}

.btn-export {
    background: var(--income-bg);
    color: var(--income-light);
    border: 1px solid var(--income-border);
}

.btn-export:hover {
    background: rgba(16, 185, 129, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--income-glow);
}

.btn-export-all {
    background: var(--balance-bg);
    color: var(--balance-light);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.btn-export-all:hover {
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--balance-glow);
}

.btn-submit {
    width: 100%;
    padding: 14px;
    font-size: 15px;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    color: white;
    border-radius: var(--radius-sm);
    margin-top: 8px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.3);
}

.btn-submit:active {
    transform: translateY(0);
}

.btn-cancel {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-cancel:hover {
    background: var(--bg-card-hover);
}

.btn-danger {
    background: linear-gradient(135deg, var(--expense-primary), #dc2626);
    color: white;
}

.btn-danger:hover {
    box-shadow: 0 4px 16px var(--expense-glow);
    transform: translateY(-1px);
}

/* ===== MAIN ===== */
.main {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 32px;
}

/* ===== CARD ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(12px);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-glow);
}

.card-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.title-icon {
    font-size: 18px;
}

/* ===== TOAST ===== */
.toast {
    position: fixed;
    bottom: 32px;
    right: 32px;
    padding: 14px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
    pointer-events: none;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    border-color: var(--income-border);
}

.toast.error {
    border-color: var(--expense-border);
}

.toast.info {
    border-color: rgba(99, 102, 241, 0.3);
}

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 500;
}

.modal-overlay.visible {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    animation: modalIn 0.25s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.modal h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.modal p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.modal-actions .btn {
    padding: 10px 24px;
}

/* ===== FOOTER ===== */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 12px;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

/* ===== RESPONSIVE - GLOBAL ===== */
@media (max-width: 900px) {
    .header {
        flex-direction: column;
        gap: 12px;
        padding: 16px;
    }

    .header-right {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .main {
        padding: 16px;
    }

    .header-actions {
        flex-direction: column;
        width: 100%;
    }

    .header-actions .btn {
        width: 100%;
        justify-content: center;
    }
}