/* ============================================
    DESIGN TOKENS & DYNAMIC THEMING
============================================ */
:root {
    --sidebar-w: 360px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --income-color: #a855f7; 
    --income-glow: rgba(168, 85, 247, 0.2);
    --expense-color: #f59e0b;
    --expense-glow: rgba(245, 158, 11, 0.2);
    --bg-rgb: 8, 8, 12; 
    --bg: #08080c;
    --card-bg: rgba(20, 20, 30, 0.7);
    --card-border: rgba(255, 255, 255, 0.08);
    --accent: #00d4ff;
    --accent-glow: rgba(0, 212, 255, 0.3);
    --text: #f0f0f5;
    --text-dim: #8e919e;
    --input-bg: #12121e;
    --shadow: 0 30px 70px rgba(0, 0, 0, 0.7);
    --mesh: radial-gradient(circle at 0% 0%, rgba(168, 85, 247, 0.12) 0%, transparent 45%),
            radial-gradient(circle at 100% 100%, rgba(0, 212, 255, 0.1) 0%, transparent 45%);
    --red: #ff4d4d;
}

[data-theme="light"] {
    --bg-rgb: 253, 252, 248;
    --bg: #fdfcf8;
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-border: rgba(0, 0, 0, 0.05);
    --accent: #5e5ce6;
    --accent-glow: rgba(94, 92, 230, 0.15);
    --text: #1c1c2e;
    --text-dim: #6b6b80;
    --input-bg: #ffffff;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.05);
    --mesh: radial-gradient(circle at 100% 0%, rgba(255, 180, 100, 0.2) 0%, transparent 50%),
            radial-gradient(circle at 0% 100%, rgba(94, 92, 230, 0.12) 0%, transparent 50%);
}

/* ============================================
    BASE STYLES
============================================ */
* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
    /* Smooth transition for theme properties, prevents jitter */
    transition: background-color var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg);
    background-image: var(--mesh);
    background-attachment: fixed;
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}

.container { max-width: 1440px; margin: 0 auto; padding: 0 40px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* HEADER */
.header {
    position: sticky; top: 0; z-index: 100; padding: 18px 0;
    background: rgba(var(--bg-rgb), 0.8); 
    backdrop-filter: blur(50px);
    border-bottom: 1px solid var(--card-border);
}

.brand { text-decoration: none; color: inherit; display: flex; align-items: center; gap: 15px; }

.logo-box {
    width: 44px; height: 44px;
    background: linear-gradient(135deg, var(--accent), var(--income-color));
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 10px 20px var(--accent-glow);
    border-radius: 12px;
}

.logo-box svg { width: 28px; height: 28px; fill: white; animation: logo-rotate 8s linear infinite; }
@keyframes logo-rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.logo-text { font-weight: 800; font-size: 1.5rem; letter-spacing: -1px; }
.logo-text span { color: var(--accent); font-weight: 400; opacity: 0.8; }

/* OVERLAYS */
.overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg); z-index: 10000;
    display: flex; align-items: center; justify-content: center;
}
.overlay.hidden { opacity: 0; pointer-events: none; }
.overlay-msg { text-align: center; font-size: 2rem; font-weight: 800; letter-spacing: -1px; }

/* CARDS */
.main-grid {
    display: grid; grid-template-columns: 1fr var(--sidebar-w);
    gap: 40px; margin: 50px 0; align-items: start;
}

.card {
    background: var(--card-bg); backdrop-filter: blur(50px);
    border: 1px solid var(--card-border); border-radius: 28px;
    padding: 35px; box-shadow: var(--shadow);
}

.title-row { 
    font-size: 0.9rem; font-weight: 800; margin-bottom: 30px; 
    display: flex; gap: 12px; align-items: center; 
    color: var(--accent); text-transform: uppercase; letter-spacing: 1.5px; 
}

/* FORMS */
.form-grid { display: grid; grid-template-columns: 180px 1fr 180px auto; gap: 20px; align-items: flex-end; }
.input-box label { display: block; font-size: 0.7rem; font-weight: 800; color: var(--text-dim); margin-bottom: 12px; text-transform: uppercase; }

input, select {
    width: 100%; padding: 18px 24px; background: var(--input-bg);
    border: 1px solid var(--card-border); border-radius: 16px;
    color: var(--text); font-family: inherit; font-size: 1.05rem; outline: none; 
}
input:focus { border-color: var(--accent); box-shadow: 0 0 20px var(--accent-glow); }

.btn-prime {
    background: var(--accent); color: #fff; padding: 18px 40px;
    border: none; border-radius: 16px; font-weight: 800;
    cursor: pointer; text-transform: uppercase;
}
[data-theme="dark"] .btn-prime { color: #000; }
.btn-small { padding: 12px 28px; font-size: 0.8rem; }

/* AUTH SPECIFIC */
.auth-card { width: 400px; text-align: center; }
.auth-form { display: flex; flex-direction: column; gap: 15px; margin-top: 25px; }
.auth-btns { display: flex; gap: 10px; margin-top: 10px; }
.auth-btns .btn-prime { background: var(--income-color) !important; color: white !important; flex: 1; }
#auth-error { color: var(--red); font-size: 0.8rem; margin-top: 15px; font-weight: 700; }

/* LEDGER */
.ledger-item {
    display: grid; grid-template-columns: 55px 1fr auto 44px;
    align-items: center; gap: 25px; padding: 20px 30px;
    background: rgba(128, 128, 128, 0.05); border-radius: 20px;
    border: 1px solid var(--card-border); margin-bottom: 15px;
}
.icon-circle { width: 55px; height: 55px; border-radius: 18px; display: flex; align-items: center; justify-content: center; }
.inflow-style { background: var(--income-glow); color: var(--income-color); }
.outflow-style { background: var(--expense-glow); color: var(--expense-color); }

/* SIDEBAR UTILS */
.chart-container { height: 200px; position: relative; display: flex; justify-content: center; }
.label-caps { font-size: 0.7rem; font-weight: 800; color: var(--text-dim); text-transform: uppercase; }
.spaced { letter-spacing: 2px; }
#total-balance { font-size: 2.8rem; font-weight: 800; margin-top: 15px; letter-spacing: -1px; }
.balance-card { text-align: center; border: 2px solid var(--accent-glow); }
.ai-btn { width: 100%; margin-top: 25px; background: linear-gradient(90deg, var(--accent), var(--income-color)); color: white !important; }

/* BUDGET */
.progress-track { height: 8px; background: var(--input-bg); border-radius: 10px; margin-top: 10px; overflow: hidden; border: 1px solid var(--card-border); }
#budget-bar { height: 100%; transition: width 0.6s ease; }
#budget-bar.safe { background: var(--income-color); }
#budget-bar.warning { background: var(--expense-color); }
#budget-bar.danger { background: var(--red); }
#budget-status { display: block; margin-top: 10px; font-size: 0.65rem; color: var(--text-dim); font-weight: 600; }
#budget-percent { font-size: 0.7rem; font-weight: 800; color: var(--accent); }

/* CHAT */
.chat-widget { position: fixed; bottom: 40px; right: 40px; z-index: 1000; }
.chat-btn {
    width: 72px; height: 72px; border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--income-color));
    border: none; color: #fff; font-size: 2.2rem; cursor: pointer;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
    display: flex; align-items: center; justify-content: center;
}
.chat-window {
    position: absolute; bottom: 95px; right: 0;
    width: 380px; height: 550px;
    background: var(--bg); border: 1px solid var(--card-border);
    border-radius: 35px; display: flex; flex-direction: column;
    box-shadow: var(--shadow); opacity: 0; transform: translateY(20px);
    pointer-events: none; transition: 0.4s; overflow: hidden;
}
.chat-window.open { opacity: 1; transform: translateY(0); pointer-events: all; }
.chat-header { padding: 25px; background: var(--card-bg); border-bottom: 1px solid var(--card-border); display: flex; justify-content: space-between; font-weight: 800; font-size: 0.8rem; letter-spacing: 1px; }
.chat-body { flex: 1; padding: 25px; overflow-y: auto; display: flex; flex-direction: column; gap: 15px; }
.chat-footer { padding: 20px; border-top: 1px solid var(--card-border); display: flex; gap: 10px; }
.chat-footer .btn-prime { padding: 12px 18px; }

.msg { padding: 14px 20px; border-radius: 22px; max-width: 85%; font-size: 0.9rem; line-height: 1.5; }
.msg.bot { background: var(--card-bg); align-self: flex-start; color: var(--text); border-bottom-left-radius: 4px; }
.msg.user { background: var(--accent); color: #000; align-self: flex-end; border-bottom-right-radius: 4px; font-weight: 600; }

/* UTILS */
.magic-btn { width: 50px; height: 50px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; background: var(--card-bg); border: 1px solid var(--card-border); color: var(--accent); }
.del-btn { background: none; border: none; color: var(--text-dim); cursor: pointer; }
.del-btn:hover { color: var(--red); transform: scale(1.2); }
.margin-top-40 { margin-top: 40px; }
.margin-top-20 { margin-top: 20px; }

@media (max-width: 1100px) {
    .main-grid { grid-template-columns: 1fr; }
    .container { padding: 0 20px; }
    .form-grid { grid-template-columns: 1fr; }
}