/* ==============================
   Reset & Base
============================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg);
    color: var(--text);
    transition: background 0.3s, color 0.3s;
}

:root {
    /* Light mode */
    --bg: #f5f7fa;
    --card-bg: #ffffff;
    --text: #333333;
    --primary: #1e3a5f;
    --secondary: #2c5282;
    --accent: #d4af37;
    --success: #38b000;
    --warning: #ff9f1c;
    --danger: #e63946;
    --kpi-bg: #f0f4f8;
    --shadow: rgba(0,0,0,0.1);
}

/* Dark mode */
body.dark-mode {
    --bg: #121212;
    --card-bg: #1e1e1e;
    --text: #eee;
    --primary: #2c5282;
    --secondary: #1e3a5f;
    --accent: #ffb703;
    --success: #38b000;
    --warning: #ff9f1c;
    --danger: #e63946;
    --kpi-bg: #1f1f1f;
    --shadow: rgba(0,0,0,0.7);
}

/* ==============================
   Layout
============================== */
.container {
    width: 95%;
    max-width: 1200px;
    margin: auto;
    padding: 20px 0;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px var(--shadow);
    margin-bottom: 20px;
    transition: background 0.3s, box-shadow 0.3s;
}

h1,h2,h3,h4,h5 {
    color: var(--text);
    margin-bottom: 15px;
}

/* ==============================
   Buttons
============================== */
button, .btn {
    background: var(--primary);
    color: #fff;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: 0.2s;
    font-weight: 600;
    display: inline-block;
    text-decoration: none;
}

button:hover, .btn:hover {
    background: var(--secondary);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.9rem;
}

.btn.accent {
    background: var(--accent);
    color: #000;
}

.btn.accent:hover {
    background: #e6b800;
}

/* ==============================
   KPI Cards
============================== */
.kpi-card {
    background: var(--kpi-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
    transition: transform 0.3s;
    text-align: center;
}

.kpi-card:hover {
    transform: translateY(-5px);
}

.kpi-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary);
    animation: kpiPulse 1.5s infinite;
}

@keyframes kpiPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* ==============================
   Tables
============================== */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px var(--shadow);
}

th, td {
    padding: 15px;
    text-align: left;
}

th {
    background: var(--primary);
    color: #fff;
}

tr:nth-child(even) {
    background: var(--kpi-bg);
}

/* ==============================
   Forms & Inputs
============================== */
input, select, textarea {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #ccc;
    margin-bottom: 15px;
    background: var(--card-bg);
    color: var(--text);
    transition: 0.2s;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    outline: none;
}

/* ==============================
   Charts
============================== */
.chart-container {
    width: 100%;
    height: 300px;
    margin-bottom: 20px;
}

/* ==============================
   Notifications / Toast
============================== */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary);
    color: #fff;
    padding: 12px 20px;
    border-radius: 10px;
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 9999;
    animation: slideIn 0.5s ease forwards;
}

@keyframes slideIn {
    0% { opacity: 0; transform: translateY(20px);}
    100% { opacity: 1; transform: translateY(0);}
}

/* ==============================
   Dark/Light Toggle
============================== */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.toggle-switch input { display:none; }

.slider {
    position: absolute;
    cursor: pointer;
    background-color: #ccc;
    border-radius: 34px;
    top:0; left:0; right:0; bottom:0;
    transition: 0.4s;
}

.slider:before {
    position: absolute;
    content: "";
    height:26px;
    width:26px;
    left:4px;
    bottom:4px;
    background-color:white;
    border-radius:50%;
    transition: 0.4s;
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* ==============================
   Landing Page Styles
============================== */
#landing-page header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background: var(--card-bg);
    box-shadow: 0 2px 10px var(--shadow);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

.hero {
    text-align: center;
    padding: 80px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.hero h1 {
    font-size: 2.5rem;
    max-width: 800px;
    margin: 0 auto 20px;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 30px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    padding: 60px 5%;
    background: var(--bg);
}

.feature-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
    text-align: center;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.pricing {
    padding: 60px 5%;
    text-align: center;
}

.pricing h2 {
    margin-bottom: 40px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.plan-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow);
    transition: transform 0.3s;
}

.plan-card:hover {
    transform: translateY(-10px);
}

.plan-card.pro {
    border: 2px solid var(--accent);
    transform: scale(1.05);
}

.price {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary);
    margin: 20px 0;
}

.price span {
    font-size: 1rem;
    font-weight: normal;
    color: var(--text);
}

.plan-features {
    list-style: none;
    margin: 20px 0;
    text-align: left;
}

.plan-features li {
    margin: 10px 0;
}

footer {
    background: var(--primary);
    color: white;
    text-align: center;
    padding: 20px;
}

/* Auth page */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 20px;
}

.auth-box {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px var(--shadow);
    width: 100%;
    max-width: 400px;
}

.auth-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
}

.form-input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
}

.demo-info {
    margin-top: 20px;
    padding: 10px;
    background: #e8f4fd;
    border-radius: 8px;
    font-size: 0.9rem;
    text-align: center;
    color: #0369a1;
}

.hidden {
    display: none;
}

/* ==============================
   Responsive
============================== */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    .plan-card.pro {
        transform: scale(1);
    }
}