:root {
    --primary-color: #00f3ff;
    --primary-dark: #008c99;
    --primary-glow: rgba(0, 243, 255, 0.6);
    --secondary-color: #b900ff;
    --secondary-glow: rgba(185, 0, 255, 0.6);
    --bg-color: #0b0c10;
    --sidebar-bg: #111218;
    --sidebar-text: #c5c6c7;
    --card-bg: #181a20;
    --text-main: #ffffff;
    --text-muted: #8b92a5;
    --danger: #ff0055;
    --danger-glow: rgba(255, 0, 85, 0.6);
    --success: #00ff88;
    --success-glow: rgba(0, 255, 136, 0.6);
    --border-radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
}

.hidden { display: none !important; }

/* Glowing Inputs & Buttons */
input, select {
    background: #0f1015;
    color: var(--text-main);
    border: 1px solid #2a2c35;
    transition: all 0.3s ease;
}
input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 8px var(--primary-glow);
}

button {
    transition: all 0.3s ease;
}
button:hover {
    box-shadow: 0 0 15px var(--primary-glow);
}

/* Authentication */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100vh;
}

.auth-box {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 0 20px rgba(0,0,0,0.5), 0 0 10px var(--primary-glow);
    width: 380px;
    text-align: center;
    border: 1px solid #2a2c35;
}
.auth-box h2 { 
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--primary-glow);
}
.auth-box input {
    width: 100%;
    padding: 12px;
    margin-bottom: 1.2rem;
    border-radius: 6px;
}
.auth-box button {
    width: 100%;
    padding: 12px;
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    box-shadow: inset 0 0 10px var(--primary-glow);
}
.auth-box button:hover {
    background: var(--primary-color);
    color: #000;
    box-shadow: 0 0 20px var(--primary-glow);
}
.error-msg { color: var(--danger); margin-top: 1rem; font-size: 0.9rem; text-shadow: 0 0 5px var(--danger-glow); }

/* Dashboard Layout */
.app-container {
    display: flex;
    width: 100%;
}

.sidebar {
    width: 250px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 0;
    border-left: 1px solid #2a2c35; /* RTL layout */
}

.sidebar .logo {
    text-align: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #2a2c35;
}
.sidebar .logo h2 {
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--primary-glow);
}

.sidebar nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--sidebar-text);
    padding: 1rem 1.5rem;
    text-align: right;
    font-size: 1.05rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    border-right: 3px solid transparent;
}

.nav-btn:hover, .nav-btn.active {
    background-color: rgba(0, 243, 255, 0.05);
    border-right: 3px solid var(--primary-color);
    color: var(--primary-color);
    text-shadow: 0 0 8px var(--primary-glow);
}

.logout-btn {
    background: none;
    border: none;
    color: var(--danger);
    padding: 1rem;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-top: 1px solid #2a2c35;
}
.logout-btn:hover {
    text-shadow: 0 0 8px var(--danger-glow);
    box-shadow: none;
}

.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

header h1 {
    margin-bottom: 0.5rem;
    color: #fff;
}
header p { color: var(--text-muted); margin-bottom: 2rem; }

/* Cards */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid #2a2c35;
    text-align: center;
    transition: transform 0.3s;
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,243,255,0.1);
    border-color: rgba(0,243,255,0.3);
}

.card h3 { color: var(--text-muted); font-size: 1rem; margin-bottom: 1rem; }
.card .highlight { 
    font-size: 2rem; 
    font-weight: bold; 
    color: var(--primary-color); 
    text-shadow: 0 0 10px var(--primary-glow);
}

/* Common form styles */
.form-group {
    display: flex;
    gap: 10px;
    margin: 1rem 0 2rem;
}
.form-group input, .form-group select {
    padding: 12px;
    border-radius: 6px;
    flex: 1;
}
.form-group button, .add-task button, .add-habit button {
    padding: 10px 20px;
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
}
.form-group button:hover, .add-task button:hover, .add-habit button:hover {
    background: var(--primary-color);
    color: #000;
}

/* Progress Bar */
.progress-container {
    width: 100%;
    background-color: #2a2c35;
    border-radius: 10px;
    margin: 15px 0;
    overflow: hidden;
    height: 25px;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.5);
}
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), var(--primary-color));
    width: 0%;
    transition: width 0.5s ease;
    box-shadow: 0 0 10px var(--primary-glow);
}

/* Lists */
ul { list-style: none; }
li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--card-bg);
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 10px;
    border: 1px solid #2a2c35;
}
.trans-income { border-right: 4px solid var(--success); box-shadow: 5px 0 10px -5px var(--success-glow); }
.trans-expense { border-right: 4px solid var(--danger); box-shadow: 5px 0 10px -5px var(--danger-glow); }

.delete-btn { color: var(--danger); background: none; border: none; cursor: pointer; padding: 5px;}
.delete-btn:hover { text-shadow: 0 0 8px var(--danger-glow); box-shadow: none; }

/* Tasks */
.add-task, .add-habit { display: flex; gap: 10px; margin-bottom: 2rem; }
.add-task input, .add-habit input { flex: 1; padding: 12px; border-radius: 6px; }

.tasks-list li { gap: 15px; }
.tasks-list li.completed span { text-decoration: line-through; color: var(--text-muted); }
.tasks-list li span { flex: 1; }

/* Habits */
.habits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}
.habit-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid #2a2c35;
}
.habit-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    background: transparent;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    box-shadow: inset 0 0 10px rgba(0,243,255,0.2);
}
.habit-btn.done {
    background: var(--primary-color);
    color: #000;
    box-shadow: 0 0 15px var(--primary-glow);
}

/* Big Balance */
.balance-card {
    background: linear-gradient(135deg, #181a20, #111218);
    border: 1px solid var(--primary-color);
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.2);
    color: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 2rem;
}
.balance-card h1 {
    font-size: 3rem;
    color: var(--primary-color);
    text-shadow: 0 0 15px var(--primary-glow);
    margin-top: 10px;
}