/* ===== CSS RESET & VARIABLES ===== */
:root {
    /* Color Palette - Blue, Black, Red */
    --color-primary: #3498db;
    --color-primary-dark: #2980b9;
    --color-primary-light: #5dade2;
    
    --color-secondary: #2c3e50;
    --color-secondary-dark: #1a252f;
    --color-secondary-light: #34495e;
    
    --color-accent: #e74c3c;
    --color-accent-dark: #c0392b;
    --color-accent-light: #ec7063;
    
    --color-white: #ffffff;
    --color-light: #f8f9fa;
    --color-gray: #6c757d;
    --color-dark: #212529;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-dark) 100%);
    --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
    --gradient-triple: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-accent) 100%);
    --gradient-hero: linear-gradient(135deg, rgba(52, 152, 219, 0.95) 0%, rgba(44, 62, 80, 0.9) 50%, rgba(231, 76, 60, 0.85) 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
}

/* ===== BASE STYLES ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--color-dark);
    line-height: 1.7;
    background-color: var(--color-light);
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 10% 20%, rgba(52, 152, 219, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(44, 62, 80, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(231, 76, 60, 0.03) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-secondary);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.75rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== UTILITY CLASSES ===== */
.text-gradient-primary {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-gradient-accent {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-primary {
    background: var(--gradient-primary) !important;
}

.bg-gradient-secondary {
    background: var(--gradient-secondary) !important;
}

.bg-gradient-accent {
    background: var(--gradient-accent) !important;
}

.bg-gradient-triple {
    background: var(--gradient-triple) !important;
    background-size: 200% 200%;
    animation: gradient-shift 15s ease infinite;
}

.shadow-hover {
    transition: box-shadow var(--transition-normal);
}

.shadow-hover:hover {
    box-shadow: var(--shadow-lg);
}

.hover-lift {
    transition: transform var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-8px);
}

/* ===== PRELOADER ===== */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    text-align: center;
    animation: fadeIn 0.8s ease;
}

.preloader-logo {
    margin-bottom: var(--space-xl);
}

.logo-circle {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--space-md);
    border-radius: var(--radius-full);
    background: var(--gradient-triple);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 2.5rem;
    animation: pulse 2s infinite;
}

.logo-text {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: 2px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.preloader-progress {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: var(--gradient-triple);
    animation: progress-load 2s ease-in-out forwards;
}

@keyframes progress-load {
    0% { width: 0%; }
    100% { width: 100%; }
}

/* ===== CURSOR EFFECT ===== */
.cursor-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    position: fixed;
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s, background 0.2s;
}

.cursor-outline {
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-full);
    position: fixed;
    pointer-events: none;
    z-index: 9997;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s, border-color 0.3s;
}

.cursor-dot.hover {
    width: 12px;
    height: 12px;
    background: var(--color-accent);
}

.cursor-outline.hover {
    width: 60px;
    height: 60px;
    border-color: var(--color-accent);
}

/* ===== FLOATING ELEMENTS ===== */
.floating-elements {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.floating-element {
    position: absolute;
    border-radius: var(--radius-full);
    opacity: 0.1;
    filter: blur(40px);
}

.floating-element.el-1 {
    width: 300px;
    height: 300px;
    background: var(--color-primary);
    top: 10%;
    left: 10%;
    animation: float-vertical 20s infinite ease-in-out;
}

.floating-element.el-2 {
    width: 200px;
    height: 200px;
    background: var(--color-accent);
    top: 60%;
    right: 15%;
    animation: float-horizontal 25s infinite ease-in-out;
}

.floating-element.el-3 {
    width: 150px;
    height: 150px;
    background: var(--color-secondary);
    bottom: 20%;
    left: 20%;
    animation: float-diagonal 30s infinite ease-in-out;
}

@keyframes float-vertical {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-100px) rotate(180deg); }
}

@keyframes float-horizontal {
    0%, 100% { transform: translateX(0) rotate(0deg); }
    50% { transform: translateX(100px) rotate(180deg); }
}

@keyframes float-diagonal {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(100px, -50px) rotate(120deg); }
    66% { transform: translate(-50px, 100px) rotate(240deg); }
}

/* ===== MAIN CONTENT ===== */
.main-content {
    position: relative;
    z-index: 1;
}

/* ===== SCROLL PROGRESS ===== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: transparent;
    z-index: 9996;
}

.scroll-progress-bar {
    width: 0%;
    height: 100%;
    background: var(--gradient-triple);
    transition: width 0.1s ease;
}

/* ===== BACK TO TOP ===== */
.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    z-index: 9995;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--gradient-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

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

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes typewriter {
    from { width: 0; }
    to { width: 100%; }
}

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

/* ===== SECTIONS ===== */
.section {
    padding: var(--space-2xl) 0;
    position: relative;
}

.section-title {
    position: relative;
    margin-bottom: var(--space-xl);
    text-align: center;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-triple);
    border-radius: var(--radius-full);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-gray);
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-xl);
}

/* ===== CARDS ===== */
.card {
    border: none;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-triple);
    transition: height var(--transition-normal);
}

.card:hover::before {
    height: 6px;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-img-container {
    position: relative;
    overflow: hidden;
    height: 220px;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.card:hover .card-img {
    transform: scale(1.1);
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 40%, rgba(0, 0, 0, 0.8));
    display: flex;
    align-items: flex-end;
    padding: var(--space-lg);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover .card-overlay {
    opacity: 1;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    outline: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    border-color: transparent;
}

.btn-primary:hover {
    background: var(--gradient-accent);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: var(--color-white);
    border-color: transparent;
}

.btn-secondary:hover {
    background: var(--gradient-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-accent {
    background: var(--gradient-accent);
    color: var(--color-white);
    border-color: transparent;
}

.btn-accent:hover {
    background: var(--gradient-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline-primary:hover {
    background: var(--gradient-primary);
    color: var(--color-white);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-secondary {
    background: transparent;
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}

.btn-outline-secondary:hover {
    background: var(--gradient-secondary);
    color: var(--color-white);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-accent {
    background: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-outline-accent:hover {
    background: var(--gradient-accent);
    color: var(--color-white);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--radius-full);
}

.badge-gradient-primary {
    background: var(--gradient-primary);
    color: var(--color-white);
}

.badge-gradient-secondary {
    background: var(--gradient-secondary);
    color: var(--color-white);
}

.badge-gradient-accent {
    background: var(--gradient-accent);
    color: var(--color-white);
}

/* ===== FORMS ===== */
.form-control {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-dark);
    background-color: var(--color-white);
    background-clip: padding-box;
    border: 1px solid #dee2e6;
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    border-color: var(--color-primary);
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(52, 152, 219, 0.25);
}

.form-label {
    display: inline-block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

/* ===== MODAL ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(30px);
    transition: transform var(--transition-normal);
}

.modal.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-gray);
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--color-accent);
}

/* ===== TOAST ===== */
.toast {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transform: translateX(100%);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 9999;
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast-success {
    border-left: 4px solid #28a745;
}

.toast-error {
    border-left: 4px solid var(--color-accent);
}

.toast-info {
    border-left: 4px solid var(--color-primary);
}

.toast-icon {
    font-size: 1.5rem;
}

.toast-success .toast-icon {
    color: #28a745;
}

.toast-error .toast-icon {
    color: var(--color-accent);
}

.toast-info .toast-icon {
    color: var(--color-primary);
}

.toast-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--color-gray);
    margin-left: auto;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1200px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.5rem; }
    h3 { font-size: 1.75rem; }
}

@media (max-width: 992px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }
    
    .section {
        padding: var(--space-xl) 0;
    }
    
    .logo-circle {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }
    
    .logo-text {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
    
    html {
        font-size: 14px;
    }
    
    .section {
        padding: var(--space-lg) 0;
    }
    
    .back-to-top {
        bottom: var(--space-lg);
        right: var(--space-lg);
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 576px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    
    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .logo-circle {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .logo-text {
        font-size: 1.5rem;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .navbar,
    .footer,
    .back-to-top,
    .floating-elements,
    .cursor-dot,
    .cursor-outline,
    .scroll-progress {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
    
    a {
        color: black !important;
        text-decoration: underline !important;
    }
}