/* Reset e Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3b82f6;
    --secondary-color: #1f2937;
    --accent-color: #fbbf24;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-dark: #ffffff;
    --card-bg: #ffffff;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --border-color: #e5e7eb;
    --header-bg: rgba(255, 255, 255, 0.95);
    --header-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

/* Dark theme variables */
[data-theme="dark"] {
    --primary-color: #60a5fa;
    --secondary-color: #f3f4f6;
    --accent-color: #fbbf24;
    --text-color: #f3f4f6;
    --text-light: #9ca3af;
    --bg-light: #111827;
    --bg-dark: #1f2937;
    --card-bg: #374151;
    --white: #f3f4f6;
    --shadow: 0 10px 30px rgba(0,0,0,0.5);
    --gradient: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    --border-color: #4b5563;
    --header-bg: rgba(31, 41, 55, 0.95);
    --header-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-light);
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

html {
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(59, 130, 246, 0.3);
}

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

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

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

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-premium {
    background: linear-gradient(135deg, #8e44ad 0%, #9b59b6 100%);
    color: var(--white);
    box-shadow: 0 10px 30px rgba(142, 68, 173, 0.3);
}

.btn-premium:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(142, 68, 173, 0.4);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

.btn-xl {
    padding: 20px 40px;
    font-size: 20px;
}

.btn-full {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 15px 0;
    box-shadow: var(--header-shadow);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 30px;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-color);
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.theme-toggle i {
    font-size: 18px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    font-size: 24px;
    color: var(--text-color);
}

.nav-toggle:hover {
    color: var(--primary-color);
}

/* Section Titles */
.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 60px;
}