/* ============================================
   GLOBAL STYLES — Ezotera Frontend
   Design system: colors, typography, reset,
   utilities, responsive breakpoints
   ============================================ */

/* ----- CSS Custom Properties (Design Tokens) ----- */
:root {
    /* Primary Colors */
    --color-primary: #152b35;
    --color-primary-light: #1e3a47;
    --color-primary-dark: #0e1f27;

    /* Accent Colors */
    --color-accent: #6c5ce7;
    --color-accent-light: #a29bfe;
    --color-accent-dark: #4a3db8;

    /* Secondary Accent */
    --color-secondary: #e17055;
    --color-secondary-light: #fab1a0;

    /* Gold / Highlight */
    --color-gold: #f9ca24;
    --color-gold-light: #ffeaa7;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-off-white: #f8f9fa;
    --color-light-gray: #e9ecef;
    --color-gray: #adb5bd;
    --color-dark-gray: #495057;
    --color-text: #2d3436;
    --color-text-light: #636e72;
    --color-black: #000000;

    /* Gradient Backgrounds */
    --gradient-hero: linear-gradient(135deg, #0c1b24 0%, #152b35 40%, #1a3345 100%);
    --gradient-accent: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
    --gradient-card: linear-gradient(180deg, rgba(108, 92, 231, 0.05) 0%, rgba(108, 92, 231, 0.02) 100%);
    --gradient-dark-section: linear-gradient(180deg, #0e1f27 0%, #152b35 100%);

    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;

    /* Font Sizes */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;
    --font-size-5xl: 3.5rem;

    /* Font Weights */
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Line Heights */
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing Scale */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    --spacing-5xl: 8rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(108, 92, 231, 0.3);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Layout */
    --container-max-width: 1200px;
    --container-padding: 1.5rem;
    --header-height: 72px;

    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
    --z-toast: 500;
}


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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

ul,
ol {
    list-style: none;
}

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

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-primary);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

p {
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-relaxed);
}


/* ----- Container ----- */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}


/* ----- Section Spacing ----- */
.section {
    padding-top: var(--spacing-4xl);
    padding-bottom: var(--spacing-4xl);
}

.section--dark {
    background: var(--gradient-dark-section);
    color: var(--color-white);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
    color: var(--color-white);
}

.section--light {
    background-color: var(--color-off-white);
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

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

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.section--dark .section__subtitle {
    color: var(--color-gray);
}


/* ----- Buttons ----- */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 14px 32px;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

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

.button--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(108, 92, 231, 0.5);
}

.button--primary:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.25);
}

.button--primary:active {
    transform: translateY(0);
}

.button--primary::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 40%;
    height: 200%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transform: skewX(-20deg);
    transition: left 0.6s ease;
}

.button--primary:hover::after {
    left: 120%;
}

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

.button--secondary:hover {
    background-color: var(--color-accent);
    color: var(--color-white);
    transform: translateY(-2px);
}

.button--secondary:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.25);
}

.button--secondary:active {
    transform: translateY(0);
}

.button--outline-white {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.button--outline-white:hover {
    border-color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.1);
}

.button--outline-white:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.25);
}

.button--outline-white:active {
    transform: translateY(0);
}

.button--large {
    padding: 16px 40px;
    font-size: var(--font-size-md);
}

.button--small {
    padding: 10px 20px;
    font-size: var(--font-size-sm);
}

.button--full-width {
    width: 100%;
}


/* ----- Utility Classes ----- */
.text-center {
    text-align: center;
}

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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in--visible {
    opacity: 1;
    transform: translateY(0);
}


/* ----- Responsive Breakpoints ----- */

/* Laptop: 1024px */
@media (max-width: 1024px) {
    :root {
        --font-size-4xl: 2.5rem;
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.75rem;
    }

    .section {
        padding-top: var(--spacing-3xl);
        padding-bottom: var(--spacing-3xl);
    }
}

/* Tablet: 768px */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.5rem;
        --font-size-xl: 1.25rem;
        --container-padding: 1.25rem;
    }

    .section {
        padding-top: var(--spacing-2xl);
        padding-bottom: var(--spacing-2xl);
    }
}

/* Mobile: 480px */
@media (max-width: 480px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
        --font-size-xl: 1.125rem;
        --container-padding: 1rem;
    }

    .button {
        padding: 12px 24px;
        font-size: var(--font-size-sm);
    }

    .button--large {
        padding: 14px 32px;
        font-size: var(--font-size-base);
    }
}