/* ============================================
   GitHub Exact Signup Page - Split Layout
   Senior Designer Implementation
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

/* Design Tokens - GitHub Exact */
:root {
    /* Colors */
    --gh-bg-default: #ffffff;
    --gh-bg-subtle: #f6f8fa;
	
    --gh-bg-dark: #0d1117;
    --gh-bg-gradient-start: #1e40af;
    --gh-bg-gradient-end: #1d4ed8;

    /* Text */
    --gh-text-default: #1f2328;
    --gh-text-muted: #59636e;
    --gh-text-subtle: #6e7781;
    --gh-text-on-dark: #ffffff;
    --gh-text-on-dark-muted: rgba(255, 255, 255, 0.7);

    /* Borders */
    --gh-border-default: #d1d9e0;
    --gh-border-muted: #d8dee4;

    /* Interactive */
    --gh-focus-ring: #0969da;
    --gh-link: #0969da;
	
    --gh-btn-primary-bg: #1e40af;
    --gh-btn-primary-hover: #1d4ed8;
	
    --gh-btn-secondary-bg: #f6f8fa;
    --gh-btn-secondary-hover: #f3f4f6;

    /* Success */
    --gh-success: #1e40af;
    --gh-success-emphasis: #1e40af;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 40px;

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
}

/* Body */
body {
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
    color: var(--gh-text-default);
    background-color: var(--gh-bg-default);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Page Layout - Split Design ===== */
.gh-signup-page {
    min-height: 100vh;
    display: flex;
}




/* ===== Left Panel - Marketing ===== */
.gh-signup-marketing {
    width: 50%;
    min-height: 100vh;
	background: linear-gradient(
	    180deg,
	    #0b3c8c 0%,   /* 상단 */
	    #0a2a66 45%,  /* 중간 */
	    #050b1d 100%  /* 하단 */
	);
    padding: var(--space-20) var(--space-20) var(--space-12);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

/* 2) 은은한 메인 그린 라디얼 하이라이트 */
.gh-signup-marketing::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(
            ellipse 70% 45% at 50% 0%,
            rgba(11, 60, 140, 0.35),
            transparent 60%
        );
    pointer-events: none;
}

/* 3) 메인과 동일한 그리드 텍스처 톤 */
.gh-signup-marketing::before {
    background-image:
        linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size:
        60px 60px,
        60px 60px;
}






/* Stars Background Effect */
.gh-signup-marketing::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(1px 1px at 20px 30px, rgba(255,255,255,0.3), transparent),
        radial-gradient(1px 1px at 40px 70px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1px 1px at 50px 160px, rgba(255,255,255,0.3), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(255,255,255,0.3), transparent),
        radial-gradient(1px 1px at 160px 120px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1.5px 1.5px at 200px 200px, rgba(255,255,255,0.4), transparent),
        radial-gradient(1px 1px at 250px 50px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1px 1px at 300px 150px, rgba(255,255,255,0.3), transparent);
    pointer-events: none;
}

.gh-marketing-content {
    position: relative;
    z-index: 1;
    flex: 1;
}

.gh-marketing-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--gh-text-on-dark);
    margin-bottom: var(--space-3);
    line-height: var(--line-height-tight);
}

.gh-marketing-subtitle {
    font-size: var(--font-size-base);
    color: var(--gh-text-on-dark-muted);
    margin-bottom: var(--space-6);
    max-width: 400px;
}

/* Features List */
.gh-marketing-features {
    margin-top: var(--space-8);
}

.gh-marketing-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--gh-text-on-dark);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
}

.gh-marketing-toggle svg {
    transition: transform 0.2s;
}

.gh-marketing-toggle.open svg {
    transform: rotate(180deg);
}

.gh-features-list {
    list-style: none;
    margin-top: var(--space-4);
    display: none;
}

.gh-features-list.show {
    display: block;
}

.gh-feature-item {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.gh-feature-icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    color: var(--gh-text-on-dark);
    margin-top: 2px;
}

.gh-feature-text {
    color: var(--gh-text-on-dark);
}

.gh-feature-title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.gh-feature-desc {
    color: var(--gh-text-on-dark-muted);
    font-size: var(--font-size-sm);
}

/* Marketing Illustration */
.gh-marketing-illustration {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    padding-bottom: var(--space-8);
}

.gh-illustration-wrapper {
    display: flex;
    gap: var(--space-6);
    align-items: flex-end;
}

.gh-mascot {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    animation: float 3s ease-in-out infinite;
}

.gh-mascot:nth-child(2) {
    background: linear-gradient(135deg, #f97316 0%, #fbbf24 100%);
    animation-delay: 0.5s;
}

.gh-mascot:nth-child(3) {
    background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    animation-delay: 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ===== Right Panel - Form ===== */
.gh-signup-form-panel {
    width: 50%;
    min-height: 100vh;
    background-color: var(--gh-bg-default);
    padding: var(--space-6) var(--space-12);
    display: flex;
    flex-direction: column;
}

/* Top Navigation */
.gh-signup-nav {
    display: flex;
    justify-content: flex-end;
    margin-bottom: var(--space-10);
}

.gh-signup-nav-text {
    font-size: var(--font-size-sm);
    color: var(--gh-text-muted);
}

.gh-signup-nav-link {
    color: var(--gh-text-default);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    margin-left: var(--space-1);
}

.gh-signup-nav-link:hover {
    text-decoration: underline;
}

/* Form Container */
.gh-signup-form-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 452px;
}

/* Form Title */
.gh-signup-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--gh-text-default);
    margin-bottom: var(--space-6);
}

/* Social Login Section */
.gh-social-section {
    margin-bottom: var(--space-4);
}

.gh-btn-social {
    width: 100%;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0 var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--gh-text-default);
    background-color: var(--gh-bg-subtle);
    border: 1px solid var(--gh-border-default);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color 0.15s;
    text-decoration: none;
}

.gh-btn-social:hover {
    background-color: var(--gh-btn-secondary-hover);
}

.gh-btn-social:active {
    transform: scale(0.98);
}

.gh-btn-social + .gh-btn-social {
    margin-top: var(--space-2);
}

.gh-btn-social svg {
    flex-shrink: 0;
}

/* Divider */
.gh-divider {
    display: flex;
    align-items: center;
    margin: var(--space-4) 0;
    color: var(--gh-text-muted);
    font-size: var(--font-size-sm);
}

.gh-divider::before,
.gh-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background-color: var(--gh-border-default);
}

.gh-divider span {
    padding: 0 var(--space-3);
}

/* Form */
.gh-signup-form {
    display: flex;
    flex-direction: column;
}

/* Form Group */
.gh-form-group {
    margin-bottom: var(--space-4);
}

/* Label */
.gh-form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--gh-text-default);
    margin-bottom: var(--space-2);
}

.gh-form-label-required::after {
    content: "*";
    color: var(--gh-text-muted);
    margin-left: 2px;
}

/* Input */
.gh-form-input {
    width: 100%;
    height: 39px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    line-height: var(--line-height-normal);
    color: var(--gh-text-default);
    background-color: var(--gh-bg-default);
    border: 1px solid var(--gh-border-default);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.gh-form-input:focus {
    border-color: var(--gh-focus-ring);
    box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.3);
}

.gh-form-input::placeholder {
    color: var(--gh-text-subtle);
}

/* Select */
.gh-form-select {
    width: 100%;
    height: 39px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    color: var(--gh-text-default);
    background-color: var(--gh-bg-default);
    border: 1px solid var(--gh-border-default);
    border-radius: var(--radius-md);
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%2357606a' d='M4.427 9.427l3.396 3.396a.25.25 0 00.354 0l3.396-3.396A.25.25 0 0011.396 9H4.604a.25.25 0 00-.177.427zM4.423 6.57l3.396-3.396a.25.25 0 01.354 0l3.396 3.396a.25.25 0 01-.177.427H4.6a.25.25 0 01-.177-.427z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.gh-form-select:focus {
    border-color: var(--gh-focus-ring);
    box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.3);
}

/* Help Text */
.gh-form-help {
    font-size: var(--font-size-xs);
    color: var(--gh-text-muted);
    margin-top: var(--space-1);
    line-height: var(--line-height-normal);
}

/* Error */
.gh-form-error {
    font-size: var(--font-size-xs);
    color: #d1242f;
    margin-top: var(--space-1);
}

/* Checkbox */
.gh-checkbox-group {
    margin-bottom: var(--space-4);
}

.gh-checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--gh-text-default);
    cursor: pointer;
}

.gh-checkbox {
    width: 16px;
    height: 16px;
    margin-top: 2px;
    accent-color: var(--gh-success);
    cursor: pointer;
}

.gh-checkbox-text {
    flex: 1;
    line-height: var(--line-height-normal);
}

/* Submit Button */
.gh-btn-submit {
    width: 100%;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0 var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    font-family: var(--font-family);
    color: var(--gh-text-on-dark);
    background-color: var(--gh-btn-primary-bg);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color 0.15s;
    margin-top: var(--space-4);
}

.gh-btn-submit:hover {
    background-color: var(--gh-btn-primary-hover);
}

.gh-btn-submit:active {
    transform: scale(0.98);
}

.gh-btn-submit svg {
    width: 16px;
    height: 16px;
}

/* Terms Text */
.gh-terms-text {
    font-size: var(--font-size-xs);
    color: var(--gh-text-muted);
    margin-top: var(--space-4);
    line-height: 1.6;
}

.gh-terms-text a {
    color: var(--gh-link);
    text-decoration: none;
}

.gh-terms-text a:hover {
    text-decoration: underline;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .gh-signup-page {
        flex-direction: column;
    }

    .gh-signup-marketing {
        width: 100%;
        min-height: auto;
        padding: var(--space-8) var(--space-6);
    }

    .gh-marketing-illustration {
        display: none;
    }

    .gh-signup-form-panel {
        width: 100%;
        min-height: auto;
        padding: var(--space-6);
    }

    .gh-signup-form-container {
        max-width: 100%;
    }
}

@media (max-width: 640px) {
    .gh-signup-marketing {
        padding: var(--space-6) var(--space-4);
    }

    .gh-marketing-title {
        font-size: var(--font-size-xl);
    }

    .gh-signup-form-panel {
        padding: var(--space-4);
    }

    .gh-signup-title {
        font-size: var(--font-size-lg);
    }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .gh-mascot {
        animation: none;
    }

    .gh-btn-social,
    .gh-form-input,
    .gh-form-select,
    .gh-btn-submit,
    .gh-marketing-toggle svg {
        transition: none;
    }

    .gh-btn-social:active,
    .gh-btn-submit:active {
        transform: none;
    }
}

/* Focus Visible */
.gh-btn-social:focus-visible,
.gh-btn-submit:focus-visible {
    outline: 2px solid var(--gh-focus-ring);
    outline-offset: 2px;
}


/* ============================================
   Signup Left Panel - Background Depth Enhancement
   (단색 방지용, UI 구조 변경 없음)
============================================ */

/* 1) 메인 그라데이션 톤 보강 */
.gh-signup-marketing {
	background: linear-gradient(
	    180deg,
	    #0b3c8c 0%,
	    #0a2a66 45%,
	    #050b1d 100%
	);
}

/* 2) 은은한 블루 라디얼 하이라이트 */
.gh-signup-marketing::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(
            ellipse 70% 45% at 50% 0%,
            rgba(56, 139, 253, 0.18) 0%,
            transparent 60%
        );
    pointer-events: none;
}

/* 3) 아주 약한 그리드 텍스처 (기존 stars 위에 얹힘) */
.gh-signup-marketing::before {
    background-image:
        linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px),
        radial-gradient(1px 1px at 20px 30px, rgba(255,255,255,0.25), transparent),
        radial-gradient(1px 1px at 120px 90px, rgba(255,255,255,0.18), transparent);
    background-size:
        60px 60px,
        60px 60px,
        auto,
        auto;
}



/* =========================
   Dark Footer
========================= */
.gh-dark-footer {
	background: #010409;
	border-top: 1px solid rgba(240, 246, 252, 0.1);
	padding: 64px 24px;
}

.gh-dark-footer-inner {
	display: flex;
	justify-content: space-between;
	gap: 80px;
	max-width: 1280px;
	margin: 0 auto;
}

.gh-dark-footer-brand {
	max-width: 280px;
}

.gh-dark-footer-logo {
	display: flex;
	align-items: center;
	gap: 10px;
	color: #ffffff;
	text-decoration: none;
	font-size: 16px;
	font-weight: 600;
	margin-bottom: 16px;
}

.gh-dark-footer-logo svg {
	color: #2563eb;
}

.gh-dark-footer-copyright {
	font-size: 12px;
	color: rgba(240, 246, 252, 0.5);
	line-height: 1.6;
}

.gh-dark-footer-links {
	display: flex;
	gap: 80px;
}

.gh-dark-footer-col h4 {
	font-size: 14px;
	font-weight: 600;
	color: #ffffff;
	margin-bottom: 16px;
}

.gh-dark-footer-col ul {
	list-style: none;
	padding: 0;
	margin: 0;
}

.gh-dark-footer-col li {
	margin-bottom: 12px;
}

.gh-dark-footer-col a {
	color: rgba(240, 246, 252, 0.7);
	text-decoration: none;
	font-size: 14px;
}

.gh-dark-footer-col a:hover {
	color: #ffffff;
}

@media (max-width: 768px) {
	.gh-dark-menu,
	.gh-dark-actions {
		display: none;
	}

	.gh-dark-menu-toggle {
		display: block;
	}

	.gh-dark-footer-inner {
		flex-direction: column;
		gap: 40px;
		text-align: center;
	}

	.gh-dark-footer-links {
		justify-content: center;
		gap: 32px;
	}
}


/* ===== Footer company info ===== */
.gh-dark-footer-company-info {
	margin-top: 16px;
	font-size: 16px;
	line-height: 1.6;
	color: #b5b5b5;

	word-break: keep-all;
	overflow-wrap: break-word;

	text-align: left;
}

.gh-dark-footer-company-info p {
	margin: 0 0 6px;
}

/* 로고 + 회사정보 왼쪽 정렬 고정 */
.gh-dark-footer-brand {
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	text-align: left;

	/* 🔥 핵심: PC에서 폭 확보 */
	max-width: 520px;
}

/* ===== Footer menu text size ===== */
.gh-dark-footer-col h4 {
	font-size: 16px;
	font-weight: 600;
}

.gh-dark-footer-col a {
	font-size: 15px;
}

/* ===== PC에서 footer 전체 정렬 안정화 ===== */
@media (min-width: 1024px) {
	.gh-dark-footer-inner {
		align-items: flex-start;
	}

	.gh-dark-footer-company-info p {
		white-space: normal; /* PC에서는 자연 줄바꿈 */
	}
}

/* ===== Mobile footer text resize ===== */
@media (max-width: 768px) {
	.gh-dark-footer-company-info {
		font-size: 14px;
		line-height: 1.45;
	}

	.gh-dark-footer-company-info p {
		margin-bottom: 4px;
	}
}

/* ===== Nav ===== */
.gh-dark-nav {
	display: flex;
	align-items: center;
	justify-content: space-between;
	max-width: 1280px;
	margin: 0 auto;
	padding: 16px 24px;
}

/* ===== Logo (🔥 핵심) ===== */
.gh-dark-logo {
	display: flex;
	align-items: center;
	gap: 10px;

	color: #ffffff;              /* 🔥 텍스트 + SVG 흰색 */
	text-decoration: none;
	font-size: 18px;
	font-weight: 600;

	transition: opacity 0.2s ease;
}

.gh-dark-logo:hover {
	opacity: 0.9;
	text-decoration: none;
}

/* SVG는 currentColor 그대로 사용 */
.gh-dark-logo svg {
	width: 32px;
	height: 32px;
	stroke: currentColor;
	fill: none;
}