/* =====================================================
   CSS VARIABLES - Easy Theme Customization
   ===================================================== */

:root {
    /* Primary Colors */
    --primary-color: #4A90E2;
    --primary-dark: #2C5F8D;
    --primary-light: #E3F2FD;
    
    /* Secondary Colors */
    --secondary-color: #78909C;
    --secondary-light: #B0BEC5;
    
    /* Accent Colors */
    --accent-blue: #64B5F6;
    --accent-ice: #B3E5FC;
    
    /* Text Colors */
    --text-dark: #263238;
    --text-medium: #546E7A;
    --text-light: #FFFFFF;
    
    /* Background Colors */
    --bg-gradient-start: #E3F2FD;
    --bg-gradient-end: #B3E5FC;
    --bg-white: #FFFFFF;
    --bg-card: #FAFAFA;
    
    /* Button Colors */
    --btn-primary: #4A90E2;
    --btn-primary-hover: #357ABD;
    --btn-danger: #E57373;
    --btn-danger-hover: #D32F2F;
    
    /* Border Colors */
    --border-light: #CFD8DC;
    --border-medium: #B0BEC5;
    --border-focus: #4A90E2;
    
    /* Shadow Colors */
    --shadow-light: rgba(66, 133, 191, 0.08);
    --shadow-medium: rgba(66, 133, 191, 0.15);
    --shadow-strong: rgba(66, 133, 191, 0.25);
    
    /* Spacing Scale */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 40px;
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
}


/* =====================================================
   GLOBAL STYLES
   ===================================================== */

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

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    color: var(--text-dark);
    line-height: 1.6;
    font-size: 16px;
}


/* =====================================================
   NAVIGATION BAR
   ===================================================== */

.navbar {
    background-color: var(--bg-white);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 8px var(--shadow-light);
}

.navbar h2 {
    color: var(--primary-color);
    font-size: 24px;
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.5px;
}

.welcome-message {
    color: var(--text-medium);
    font-size: 15px;
    font-weight: var(--font-weight-normal);
}

.welcome-message strong {
    color: var(--primary-color);
    font-weight: var(--font-weight-semibold);
}


/* =====================================================
   BUTTONS
   ===================================================== */

.btn {
    width: 100%;
    padding: 14px var(--spacing-md);
    background-color: var(--btn-primary);
    color: var(--text-light);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.3px;
}

.btn:hover {
    background-color: var(--btn-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

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

.logout-btn {
    background-color: var(--btn-danger);
    color: var(--text-light);
    padding: 10px 24px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: var(--font-weight-semibold);
    font-size: 14px;
    transition: all 0.3s ease;
    display: inline-block;
    letter-spacing: 0.3px;
}

.logout-btn:hover {
    background-color: var(--btn-danger-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(211, 47, 47, 0.25);
}

/* Print Button */
.print-btn {
    width: 100%;
    padding: 12px var(--spacing-md);
    background-color: var(--primary-color);
    color: var(--text-light);
    border: none;
    border-radius: 8px;
    font-weight: var(--font-weight-semibold);
    font-size: 15px;
    cursor: pointer;
    margin-top: var(--spacing-md);
    transition: all 0.3s ease;
    letter-spacing: 0.3px;
}

.print-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

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


/* =====================================================
   FORM CONTAINERS
   ===================================================== */

.login-container,
.register-container {
    background-color: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--shadow-medium);
    width: 100%;
    max-width: 480px;
    margin: 50px auto;
}

.container {
    padding: var(--spacing-md);
}

h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 28px;
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.5px;
}


/* =====================================================
   FORM GROUPS
   ===================================================== */

.form-group {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-semibold);
    font-size: 14px;
    letter-spacing: 0.2px;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--border-light);
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s ease;
    background-color: var(--bg-white);
    font-family: var(--font-family);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--border-focus);
    background-color: var(--primary-light);
    box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.08);
}

.feedback-text {
    font-size: 13px;
    margin-top: 6px;
    min-height: 20px;
    font-weight: var(--font-weight-medium);
}


/* =====================================================
   LINKS
   ===================================================== */

.login-link,
.register-link {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--text-medium);
    font-size: 14px;
}

.login-link a,
.register-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
}

.login-link a:hover,
.register-link a:hover {
    text-decoration: underline;
    color: var(--primary-dark);
}

.back-link {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.back-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    font-weight: var(--font-weight-medium);
}

.back-link a:hover {
    text-decoration: underline;
    color: var(--primary-dark);
}


/* =====================================================
   MESSAGE BOXES
   ===================================================== */

.message {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    text-align: center;
    font-weight: var(--font-weight-medium);
    font-size: 14px;
}

.message.success {
    background-color: #E8F5E9;
    color: #2E7D32;
    border: 1px solid #A5D6A7;
}

.message.error {
    background-color: #FFEBEE;
    color: #C62828;
    border: 1px solid #EF9A9A;
}

.message.warning {
    background-color: #FFF3E0;
    color: #E65100;
    border: 1px solid #FFCC80;
}


/* =====================================================
   BIODATA PAGE -  LAYOUT
   ===================================================== */

.biodata-container {
    display: flex;
    gap: var(--spacing-lg);
    margin: var(--spacing-md) auto;
    max-width: 1200px;
    background-color: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--shadow-medium);
}

/* LEFT COLUMN - Profile Section */
.profile-section {
    flex: 0 0 280px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.profile-image {
    width: 240px;
    height: 240px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
    box-shadow: 0 4px 16px var(--shadow-medium);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.profile-image:hover {
    transform: scale(1.12);
    box-shadow: 0 8px 24px var(--shadow-strong);
    cursor: pointer;
}

.image-hint {
    margin-top: var(--spacing-md);
    color: var(--text-medium);
    font-size: 12px;
    font-style: italic;
    font-weight: var(--font-weight-normal);
}

/* RIGHT COLUMN - Biodata Content */
.biodata-content {
    flex: 1;
    min-width: 0; /* Prevents flex overflow */
}

.biodata-title {
    color: var(--primary-color);
    font-size: 32px;
    font-weight: var(--font-weight-semibold);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
}


/* =====================================================
   SECTIONS AND TABLES DESIGN
   ===================================================== */

.section {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    color: var(--primary-color);
    font-size: 20px;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--primary-color);
    padding-left: var(--spacing-md);
    cursor: pointer;
    user-select: none;
    transition: all 0.3s ease;
    letter-spacing: -0.3px;
}

.section-title:hover {
    color: var(--primary-dark);
    transform: translateX(4px);
}

.toggle-icon {
    display: inline-block;
    transition: transform 0.3s ease;
    margin-right: var(--spacing-xs);
    color: var(--primary-color);
    font-size: 14px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    transition: all 0.3s ease;
}

.data-table tr {
    border-bottom: 1px solid var(--border-light);
    transition: background-color 0.2s ease;
}

.data-table tr:last-child {
    border-bottom: none;
}

.data-table td {
    padding: 14px 12px;
    font-size: 15px;
}

.data-table td:first-child {
    font-weight: var(--font-weight-semibold);
    color: var(--text-medium);
    width: 40%;
    font-size: 14px;
}

.data-table td:last-child {
    color: var(--text-dark);
    font-weight: var(--font-weight-normal);
    cursor: pointer; /* Shows cells are clickable */
}

/* Subtle hover effect for clickable cells */
.data-table td:last-child:hover {
    color: var(--primary-color);
}


/* =====================================================
   LANDING PAGE
   ===================================================== */

.welcome-box {
    background-color: var(--bg-white);
    padding: 50px var(--spacing-xl);
    border-radius: 16px;
    box-shadow: 0 8px 24px var(--shadow-medium);
    max-width: 600px;
    margin: 100px auto;
    text-align: center;
}

.welcome-box h1 {
    color: var(--primary-color);
    font-size: 42px;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    letter-spacing: -1px;
}

.welcome-box p {
    color: var(--text-medium);
    font-size: 16px;
    line-height: 1.7;
    font-weight: var(--font-weight-normal);
}


/* =====================================================
   PRINT STYLES
   ===================================================== */

@media print {
    .navbar,
    .print-btn,
    .logout-btn {
        display: none !important;
    }
    
    body {
        background: white;
    }
    
    .biodata-container {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .data-table {
        display: table !important;
    }
    
    .profile-image {
        border: 2px solid #333;
    }
}


/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */

@media (max-width: 768px) {
    .biodata-container {
        flex-direction: column;
        padding: var(--spacing-md);
    }
    
    .profile-section {
        flex: 1;
        width: 100%;
        margin-bottom: var(--spacing-md);
    }
    
    .profile-image {
        width: 180px;
        height: 180px;
    }
    
    .login-container,
    .register-container {
        padding: var(--spacing-md);
        margin: var(--spacing-md);
    }
    
    .welcome-box {
        padding: var(--spacing-lg);
        margin: 50px var(--spacing-md);
    }
    
    .welcome-box h1 {
        font-size: 32px;
    }
    
    .biodata-title {
        font-size: 26px;
    }
    
    .section-title {
        font-size: 18px;
    }
    
    .data-table td {
        padding: 10px 8px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .navbar {
        flex-direction: column;
        gap: var(--spacing-sm);
        padding: var(--spacing-md);
    }
    
    .navbar h2 {
        font-size: 20px;
    }
    
    .welcome-message {
        font-size: 13px;
    }
}


/* =====================================================
   UTILITIES
   ===================================================== */

.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: var(--spacing-md);
}

.mb-20 {
    margin-bottom: var(--spacing-md);
}