/* ===============================================
   GLENFERDINZA LANDING PAGE - CUSTOM STYLES
   Professional Web Developer & ML Engineer
   =============================================== */

/* ============= ROOT VARIABLES ============= */
:root {
    /* Color Palette - Soft Black & White Theme */
    --color-bg-primary: #0f0f0f;
    --color-bg-secondary: #1a1a1a;
    --color-bg-card: rgba(25, 25, 25, 0.85);
    --color-bg-card-hover: rgba(30, 30, 30, 0.9);
    
    --color-text-primary: #f8f9fa;
    --color-text-secondary: #b8b8b8;
    --color-text-muted: #888888;
    
    --color-accent-primary: #4a90e2;
    --color-accent-secondary: #6ab7ff;
    --color-accent-success: #25d366;
    --color-accent-warning: #ffd93d;
    
    --color-border-light: rgba(255, 255, 255, 0.08);
    --color-border-medium: rgba(255, 255, 255, 0.15);
    --color-border-strong: rgba(255, 255, 255, 0.25);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing System */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 2.5rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
    
    /* Transitions */
    --transition-fast: 0.2s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    /* Z-Index Scale */
    --z-background: -10;
    --z-constellation: -5;
    --z-content: 1;
    --z-card: 10;
    --z-loading: 1000;
}

/* ============= RESET & BASE STYLES ============= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* ============= LOADING SCREEN ============= */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border-light);
    border-top: 3px solid var(--color-accent-primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

.loading-text {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    letter-spacing: 0.3px;
    font-weight: 400;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============= CONSTELLATION BACKGROUND ============= */
.constellation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-constellation);
    pointer-events: none;
    overflow: hidden;
}

#starCanvas {
    width: 100%;
    height: 100%;
    opacity: 0.6;
}

/* ============= MAIN LAYOUT ============= */
.main-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    z-index: var(--z-content);
    position: relative;
}

.card {
    background: var(--color-bg-card);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 480px;
    text-align: center;
    transition: all var(--transition-normal);
    animation: cardEntrance 0.8s ease-out;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.03), transparent);
    transition: left 1.5s;
}

.card:hover::before {
    left: 100%;
}

.card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-medium);
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl), 0 0 0 1px var(--color-border-light);
}

@keyframes cardEntrance {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ============= PROFILE SECTION ============= */
.profile-section {
    margin-bottom: var(--spacing-xl);
}

.profile-image-container {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-lg);
}

.profile-image {
    width: 140px;
    height: 140px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 3px solid var(--color-border-light);
    box-shadow: var(--shadow-lg);
}

.profile-ring {
    display: none;
}

@keyframes gradientRotate {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.name-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.role-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

.typing-text {
    font-family: var(--font-primary);
    font-size: 0.95rem;
    color: var(--color-accent-primary);
    min-height: 1.4rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 400;
}

.typing-cursor {
    animation: blink 1.2s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ============= ACTION BUTTONS ============= */
.action-buttons {
    margin-bottom: var(--spacing-xl);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    width: 100%;
    max-width: 340px;
    margin: 0 auto var(--spacing-md);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
    letter-spacing: 0.3px;
}

.btn:last-child {
    margin-bottom: 0;
}

.btn-icon {
    margin-right: var(--spacing-xs);
    font-size: 1rem;
}

.link-icon {
    margin-left: var(--spacing-xs);
    font-size: 0.8rem;
    transition: transform var(--transition-fast);
}

.btn:hover .link-icon {
    transform: translateX(3px);
}

/* Button Variants */
.btn-primary {
    background: linear-gradient(135deg, #2a2a2a, #3a3a3a);
    color: var(--color-text-primary);
    border-color: var(--color-border-light);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #333333, #444444);
    border-color: var(--color-border-medium);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: linear-gradient(135deg, #2d3748, #4a5568);
    color: var(--color-text-primary);
    border-color: rgba(74, 144, 226, 0.3);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #3d4758, #5a6578);
    border-color: rgba(74, 144, 226, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(74, 144, 226, 0.15);
}

.btn-whatsapp {
    background: linear-gradient(135deg, var(--color-accent-success), #20c55e);
    color: white;
    border-color: var(--color-accent-success);
}

.btn-whatsapp:hover {
    background: linear-gradient(135deg, #20c55e, #16a34a);
    border-color: #16a34a;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.3);
}

/* Button Animation Effect */
.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s;
}

.btn:hover::before {
    left: 100%;
}

/* ============= DIVIDER ============= */
.divider {
    display: flex;
    align-items: center;
    margin: var(--spacing-xl) 0;
    gap: var(--spacing-md);
}

.divider-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-light), transparent);
}

.divider-text {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    padding: 0 var(--spacing-sm);
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* ============= SOCIAL SECTION ============= */
.social-section {
    margin-bottom: var(--spacing-xl);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.social-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: rgba(40, 40, 40, 0.8);
    border: 1px solid var(--color-border-light);
    color: var(--color-text-primary);
    font-size: 1.3rem;
    text-decoration: none;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.social-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, var(--color-accent-primary), var(--color-accent-secondary));
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: -1;
}

.social-icon:hover::before {
    opacity: 1;
}

.social-icon:hover {
    transform: translateY(-3px) scale(1.05);
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-md);
}

.social-tooltip {
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
    border: 1px solid var(--color-border-light);
}

.social-icon:hover .social-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(-5px);
}

/* ============= FOOTER ============= */
.footer-section {
    border-top: 1px solid var(--color-border-light);
    padding-top: var(--spacing-lg);
}

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

.copyright {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
    font-weight: 400;
}

.built-with {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 300;
    display: none;
}

.heart-icon {
    color: #ff6b6b;
    animation: heartbeat 2s ease-in-out infinite;
    margin: 0 2px;
}

@keyframes heartbeat {
    0%, 50%, 100% { transform: scale(1); }
    25%, 75% { transform: scale(1.1); }
}

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

/* Tablet Styles */
@media (max-width: 768px) {
    .main-container {
        padding: var(--spacing-md);
    }
    
    .card {
        padding: var(--spacing-lg);
        max-width: 100%;
        margin: var(--spacing-sm);
    }
    
    .name-title {
        font-size: 2rem;
    }
    
    .profile-image {
        width: 110px;
        height: 110px;
    }
    
    .btn {
        padding: var(--spacing-md);
        font-size: 0.9rem;
        max-width: 100%;
    }
    
    .social-icon {
        width: 48px;
        height: 48px;
        font-size: 1.1rem;
    }
}

/* Mobile Styles */
@media (max-width: 480px) {
    :root {
        --spacing-xs: 0.4rem;
        --spacing-sm: 0.8rem;
        --spacing-md: 1.2rem;
        --spacing-lg: 1.6rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }
    
    .main-container {
        padding: var(--spacing-sm);
        min-height: 100vh;
        align-items: center;
        padding-top: var(--spacing-lg);
    }
    
    .card {
        padding: var(--spacing-md);
        border-radius: var(--radius-lg);
        margin: 0;
        max-width: calc(100vw - 2rem);
    }
    
    .name-title {
        font-size: 1.8rem;
        letter-spacing: -0.3px;
    }
    
    .role-subtitle {
        font-size: 0.95rem;
    }
    
    .profile-image {
        width: 90px;
        height: 90px;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.85rem;
        margin-bottom: var(--spacing-sm);
        max-width: 100%;
    }
    
    .social-links {
        gap: var(--spacing-sm);
    }
    
    .social-icon {
        width: 42px;
        height: 42px;
        font-size: 1rem;
    }
    
    .divider {
        margin: var(--spacing-lg) 0;
    }
    
    .divider-text {
        font-size: 0.8rem;
        padding: 0 var(--spacing-xs);
    }
    
    .typing-text {
        font-size: 0.85rem;
    }
}

/* Extra Small Mobile */
@media (max-width: 360px) {
    .card {
        padding: var(--spacing-sm);
        max-width: calc(100vw - 1rem);
    }
    
    .name-title {
        font-size: 1.6rem;
    }
    
    .profile-image {
        width: 80px;
        height: 80px;
    }
    
    .btn {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .social-icon {
        width: 38px;
        height: 38px;
        font-size: 0.95rem;
    }
}

/* Large Desktop */
@media (min-width: 1200px) {
    .card {
        max-width: 520px;
        padding: var(--spacing-xl) 2.5rem;
    }
    
    .name-title {
        font-size: 2.6rem;
    }
    
    .profile-image {
        width: 150px;
        height: 150px;
    }
    
    .btn {
        max-width: 340px;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.95rem;
    }
    
    .social-icon {
        width: 56px;
        height: 56px;
        font-size: 1.3rem;
    }
}

/* ============= ACCESSIBILITY ============= */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .loading-spinner {
        animation: none;
        border-top-color: var(--color-accent-primary);
    }
}

/* Focus Styles for Accessibility */
.btn:focus,
.social-icon:focus {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-border-light: rgba(255, 255, 255, 0.3);
        --color-border-medium: rgba(255, 255, 255, 0.5);
        --color-border-strong: rgba(255, 255, 255, 0.7);
    }
}

/* Print Styles */
@media print {
    .constellation,
    .loading-screen,
    .particle-container {
        display: none;
    }
    
    .card {
        box-shadow: none;
        border: 2px solid #333;
        background: white;
        color: black;
    }
    
    .btn {
        border: 1px solid #333;
        color: black;
    }
}