/* ========================================
   RESET & CSS VARIABLES
   ======================================== */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-base);
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul {
    list-style: none;
}

/* ========================================
   CSS VARIABLES — Dark Mode by Default
   ======================================== */

:root {
    /* Colors */
    --primary: #00ff88;
    --primary-light: #33ffaa;
    --primary-dark: #00cc6a;
    --secondary: #22d3ee;
    --accent: #00ff88;
    --accent-glow: rgba(0, 255, 136, 0.3);
    --success: #10b981;
    --whatsapp: #25d366;

    /* Background */
    --bg-primary: #050a14;
    --bg-secondary: #0d1929;
    --bg-card: rgba(13, 25, 41, 0.7);
    --bg-card-hover: #0f1f35;

    /* Text */
    --text-primary: #f0f4f8;
    --text-secondary: #a0a0b0;
    --text-muted: #8b95a5;

    /* Borders */
    --border-color: rgba(0, 255, 136, 0.12);
    --border-hover: rgba(0, 255, 136, 0.3);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(0, 255, 136, 0.3);

    /* Spacing — Fluid with clamp() */
    --section-padding: clamp(4rem, 8vw, 8rem);
    --container-max: 1280px;
    --container-padding: clamp(1rem, 4vw, 2rem);

    /* Typography */
    --font-display: 'JetBrains Mono', monospace;
    --font-body: 'DM Sans', sans-serif;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-loader: 500;

    /* Legacy aliases */
    --nav-bg: rgba(5, 10, 20, 0.92);
    --white: var(--text-primary);
    --border: var(--border-color);
    --shadow-soft: var(--shadow-lg);
}

/* ========================================
   CONTAINER
   ======================================== */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ========================================
   SECTIONS
   ======================================== */

section {
    position: relative;
}

/* ========================================
   SELECTION STYLES
   ======================================== */

::selection {
    background: var(--primary);
    color: var(--bg-primary);
}

::-moz-selection {
    background: var(--primary);
    color: var(--bg-primary);
}

/* ========================================
   SCROLLBAR
   ======================================== */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

* {
    scrollbar-width: thin;
    scrollbar-color: var(--primary) var(--bg-primary);
}

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

body.no-scroll {
    overflow: hidden;
}

#canvas-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.4;
}