/* ========================================
   ระบบคำนวณหวยอัจฉริยะ - Main Stylesheet
   ======================================== */

/* ===== Variables ===== */
:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --success: #48bb78;
    --danger: #f56565;
    --warning: #ed8936;
    --dark: #2d3748;
    --light: #f7fafc;
    --gray: #a0aec0;
    --border: #e2e8f0;
}

/* ===== Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Prompt', sans-serif;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    min-height: 100vh;
    color: var(--dark);
}

/* ===== Navbar ===== */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    transition: opacity 0.3s;
}

.logo:hover {
    opacity: 0.8;
}

.logo i {
    font-size: 2rem;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
    padding: 0.5rem;
}

.nav-menu {
    display: flex;
    gap: 20px;
}

.nav-link {
    padding: 0.5rem 1rem;
    color: var(--dark);
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s;
    font-weight: 500;
}

.nav-link i {
    margin-right: 5px;
}

.nav-link:hover,
.nav-link.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

/* ===== Main Content ===== */
.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    min-height: calc(100vh - 200px);
}

/* ===== Hero Section ===== */
.hero {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: var(--dark);
    padding: 3rem 2rem;
    border-radius: 30px;
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    color: var(--gray);
}

/* ===== Cards ===== */
.card {
    background: white;
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s;
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border);
}

.card-header i {
    font-size: 2rem;
    color: var(--primary);
}

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 2rem 1.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.stat-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.2;
}

.stat-label {
    color: var(--gray);
    margin-top: 0.5rem;
    font-size: 1rem;
}

/* ===== Number Boxes ===== */
.numbers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
    margin: 1.5rem 0;
}

.number-box {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 1.5rem 1rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
    transition: all 0.3s;
}

.number-box:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
}

.number-box .label {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.number-box .value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

/* ===== Tables ===== */
.table-responsive {
    overflow-x: auto;
    margin: 1.5rem 0;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 15px;
}

th {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 1rem;
    font-weight: 500;
    text-align: center;
}

td {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: var(--light);
}

/* ===== Badges ===== */
.badge {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.9rem;
}

.badge-success {
    background: var(--success);
}

.badge-warning {
    background: var(--warning);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

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

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

/* ===== Forms ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-family: 'Prompt', sans-serif;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* ===== Loading Spinner ===== */
.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== Notifications ===== */
.notification {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 1rem 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    gap: 10px;
    transform: translateX(400px);
    transition: transform 0.3s;
    z-index: 2000;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    border-left: 4px solid var(--success);
}

.notification.error {
    border-left: 4px solid var(--danger);
}

.notification i {
    font-size: 1.5rem;
}

.notification.success i {
    color: var(--success);
}

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

.footer small {
    opacity: 0.8;
    display: block;
    margin-top: 0.5rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

    .nav-menu.show {
        display: flex;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .numbers-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .notification {
        left: 20px;
        right: 20px;
        bottom: 20px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 2rem 1rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .numbers-grid {
        grid-template-columns: 1fr;
    }

    th, td {
        padding: 0.75rem;
        font-size: 0.9rem;
    }

    .btn {
        width: 100%;
    }
}