/*
Theme Name: Betas
Theme URI: https://betas.co.jp
Author: Betas Inc.
Author URI: https://betas.co.jp
Description: Betasコーポレートサイト用オリジナルテーマ - 鍵穴と二項対立をモチーフにしたモダンデザイン
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: betas
Tags: corporate, custom-logo, custom-menu, featured-images, full-width-template
*/

/* ==========================================================================
   CSS Variables & Design Tokens
   ========================================================================== */

:root {
    /* Brand Colors */
    --color-primary: #E98B2A;
    --color-primary-dark: #C97520;
    --color-primary-light: #F5A54D;

    /* Neutral Colors */
    --color-black: #1A1A1A;
    --color-dark: #2D2D2D;
    --color-gray: #666666;
    --color-gray-light: #B3B3B3;
    --color-white: #FFFFFF;
    --color-off-white: #F8F8F8;
    --color-cream: #FAFAF7;

    /* Left Brain (Logic) - Cool tones */
    --color-logic: #3A4A5C;
    --color-logic-light: #5A6A7C;

    /* Right Brain (Creative) - Warm tones */
    --color-creative: #E98B2A;
    --color-creative-light: #F5A54D;

    /* Typography */
    --font-primary: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', sans-serif;
    --font-accent: 'Outfit', sans-serif;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-hero: clamp(3rem, 8vw, 6rem);

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;

    --line-height-tight: 1.2;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.8;

    --letter-spacing-tight: -0.02em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.05em;
    --letter-spacing-wider: 0.1em;

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

    /* Layout */
    --container-max: 1400px;
    --container-narrow: 800px;
    --header-height: 80px;

    /* Effects */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);

    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-index */
    --z-base: 1;
    --z-sticky: 100;
    --z-fixed: 500;
    --z-modal: 1000;
    --z-tooltip: 1500;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-black);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

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

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

ul,
ol {
    list-style: none;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container--narrow {
    max-width: var(--container-narrow);
}

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

/* Skip link - visible on focus */
.skip-link:focus {
    position: fixed;
    top: var(--space-sm);
    left: var(--space-sm);
    width: auto;
    height: auto;
    padding: var(--space-sm) var(--space-md);
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-sm);
    z-index: var(--z-tooltip);
    text-decoration: none;
}

/* Text utilities */
.text-center {
    text-align: center;
}

.text-primary {
    color: var(--color-primary);
}

.text-accent {
    font-family: var(--font-accent);
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    letter-spacing: var(--letter-spacing-tight);
}

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);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
}

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

p:last-child {
    margin-bottom: 0;
}

/* ==========================================================================
   Section Styles
   ========================================================================== */

.section {
    padding: var(--space-4xl) 0;
}

.section--hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

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

.section__title {
    font-family: var(--font-accent);
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: var(--letter-spacing-wide);
    margin-bottom: var(--space-sm);
}

.section__subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
    letter-spacing: var(--letter-spacing-wider);
    text-transform: uppercase;
}

/* ==========================================================================
   Button Styles
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-accent);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    letter-spacing: var(--letter-spacing-wide);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

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

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn--outline:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn--ghost {
    background-color: transparent;
    color: var(--color-black);
    position: relative;
}

.btn--ghost::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

.btn--ghost:hover::after {
    width: 100%;
}

/* ==========================================================================
   Card Styles
   ========================================================================== */

.card {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.card__image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background-color: var(--color-off-white);
}

.card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card:hover .card__image img {
    transform: scale(1.05);
}

.card__content {
    padding: var(--space-lg);
}

.card__category {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: var(--letter-spacing-wider);
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-xs);
}

.card__excerpt {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
    line-height: var(--line-height-relaxed);
}

/* ==========================================================================
   Grid System
   ========================================================================== */

.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {

    .grid--3,
    .grid--4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {

    .grid--2,
    .grid--3,
    .grid--4 {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Animation Classes (for GSAP)
   ========================================================================== */

/* Hero elements - hidden until JS animation starts */
.hero__lead,
.hero__title,
.hero__description,
.hero__actions,
.hero__scroll,
.hero__penguin {
    opacity: 0;
}

.reveal {
    opacity: 0;
    transform: translateY(40px);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
}

/* Keyhole mask effect */
.keyhole-mask {
    clip-path: url(#keyhole-clip);
}

/* Split diagonal background */
.split-bg {
    position: relative;
}

.split-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg,
            var(--color-logic) 0%,
            var(--color-logic) 50%,
            transparent 50%);
    opacity: 0.03;
    pointer-events: none;
    z-index: 0;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
        --space-3xl: 4rem;
        --space-4xl: 5rem;
    }

    h1 {
        font-size: var(--font-size-3xl);
    }

    h2 {
        font-size: var(--font-size-2xl);
    }

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

    .container {
        padding: 0 var(--space-md);
    }
}