/*
 * Instant Share Page — 共通スタイル(専用テンプレート用)
 *
 * 全画面で読み込まれる土台。CSS 変数 / ヘッダー / フッター / カード / ボタン基本 /
 * 入力フィールド共通 / カラーパレットなど。
 */

:root {
	--isp-bg: #f3f4f6;
	--isp-bg-soft: #fafbfc;
	--isp-fg: #1f2937;
	--isp-fg-strong: #111827;
	--isp-muted: #6b7280;
	--isp-muted-soft: #9ca3af;
	--isp-border: #e5e7eb;
	--isp-border-strong: #d1d5db;
	--isp-accent: #2563eb;
	--isp-accent-strong: #1d4ed8;
	--isp-accent-soft: #dbeafe;
	--isp-accent-cyan: #06b6d4;
	--isp-success: #16a34a;
	--isp-success-soft: #dcfce7;
	--isp-warning: #d97706;
	--isp-warning-soft: #fffbeb;
	--isp-warning-border: #fde68a;
	--isp-error: #dc2626;
	--isp-error-soft: #fef2f2;
	--isp-error-border: #fecaca;
	--isp-radius: 12px;
	--isp-radius-sm: 6px;
	--isp-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
	--isp-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
	--isp-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);
	--isp-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
	--isp-font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* {
	box-sizing: border-box;
}

html,
body {
	margin: 0;
	padding: 0;
}

body.isp-app {
	background:
		radial-gradient(circle at 15% 15%, rgba(37, 99, 235, 0.10) 0%, transparent 45%),
		radial-gradient(circle at 85% 85%, rgba(6, 182, 212, 0.10) 0%, transparent 45%),
		radial-gradient(circle at 50% 100%, rgba(168, 85, 247, 0.06) 0%, transparent 50%),
		linear-gradient(180deg, #f8fafc 0%, #f3f4f6 100%);
	background-attachment: fixed;
	color: var(--isp-fg);
	font-family: var(--isp-font-sans);
	font-size: 16px;
	line-height: 1.6;
	min-height: 100vh;
	display: flex;
	flex-direction: column;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

/* ヘッダー */
.isp-app-header {
	background: #ffffff;
	border-bottom: 1px solid var(--isp-border);
	padding: 1rem 1.5rem;
	box-shadow: var(--isp-shadow-sm);
}

.isp-app-header__inner {
	max-width: 800px;
	margin: 0 auto;
	display: flex;
	align-items: center;
	justify-content: space-between;
}

.isp-app-logo {
	display: inline-flex;
	align-items: center;
	gap: 0.6rem;
	text-decoration: none;
	color: var(--isp-fg-strong);
	font-weight: 700;
	font-size: 1.05rem;
}

.isp-app-logo:hover {
	color: var(--isp-accent);
}

.isp-app-logo__mark {
	width: 1.75rem;
	height: 1.75rem;
	background: linear-gradient(135deg, var(--isp-accent), var(--isp-accent-cyan));
	border-radius: var(--isp-radius-sm);
	box-shadow: 0 2px 6px rgba(37, 99, 235, 0.3);
	flex-shrink: 0;
	position: relative;
}

.isp-app-logo__mark::before {
	content: "";
	position: absolute;
	inset: 0;
	background: linear-gradient(135deg, transparent 50%, rgba(255, 255, 255, 0.25) 50%);
	border-radius: inherit;
}

.isp-app-main {
	flex: 1;
	padding: 2rem 1rem;
	width: 100%;
}

.isp-app-footer {
	padding: 1.5rem 1rem 2rem;
	text-align: center;
	color: var(--isp-muted-soft);
	font-size: 0.8rem;
}

@media (max-width: 600px) {
	.isp-app-header {
		padding: 0.75rem 1rem;
	}

	.isp-app-main {
		padding: 1rem 0.75rem;
	}
}

/* メインカード(各画面で共通) */
.isp-container {
	max-width: 640px;
	margin: 0 auto;
	background: #ffffff;
	border: 1px solid rgba(255, 255, 255, 0.8);
	border-radius: var(--isp-radius);
	box-shadow:
		0 10px 40px rgba(15, 23, 42, 0.06),
		0 2px 8px rgba(15, 23, 42, 0.04);
	padding: 2rem;
	line-height: 1.6;
}

.isp-container *,
.isp-container *::before,
.isp-container *::after {
	box-sizing: border-box;
}

@media (max-width: 600px) {
	.isp-container {
		padding: 1.25rem;
		border-radius: 10px;
	}
}

/* ヒーロー領域(各画面のページタイトルゾーン) */
.isp-hero {
	position: relative;
	margin: -2rem -2rem 2rem;
	padding: 2rem 2rem 1.5rem;
	background: linear-gradient(135deg, #eff6ff, #f0f9ff 45%, #faf5ff);
	border-bottom: 1px solid var(--isp-border);
	border-radius: var(--isp-radius) var(--isp-radius) 0 0;
}

/* ヒーロー右上の「使い方」リンク(各画面共通) */
.isp-hero__help {
	position: absolute;
	top: 1rem;
	right: 1rem;
	display: inline-flex;
	align-items: center;
	gap: 0.3rem;
	padding: 0.35rem 0.85rem;
	background: rgba(255, 255, 255, 0.75);
	border: 1px solid var(--isp-border);
	border-radius: 9999px;
	color: var(--isp-fg);
	text-decoration: none;
	font-size: 0.8rem;
	font-weight: 600;
	transition: background 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
	z-index: 2;
}

.isp-hero__help:hover {
	background: #ffffff;
	border-color: var(--isp-accent);
	color: var(--isp-accent);
	box-shadow: 0 2px 6px rgba(37, 99, 235, 0.12);
}

.isp-hero__help svg {
	width: 0.9rem;
	height: 0.9rem;
	flex-shrink: 0;
}

@media (max-width: 600px) {
	.isp-hero {
		margin: -1.25rem -1.25rem 1.5rem;
		padding: 1.5rem 1.25rem 1.25rem;
	}

	.isp-hero__help {
		top: 0.7rem;
		right: 0.75rem;
		padding: 0.28rem 0.65rem;
		font-size: 0.75rem;
	}

	.isp-hero__help svg {
		width: 0.8rem;
		height: 0.8rem;
	}
}

/* 見出し */
.isp-heading {
	margin: 0;
	padding-bottom: 0.85rem;
	font-size: 1.75rem;
	font-weight: 800;
	color: var(--isp-fg-strong);
	letter-spacing: -0.01em;
	line-height: 1.3;
}

.isp-heading::after {
	content: "";
	display: block;
	width: 3rem;
	height: 4px;
	margin-top: 0.65rem;
	background: linear-gradient(90deg, var(--isp-accent), var(--isp-accent-cyan));
	border-radius: 2px;
}

.isp-heading-sub {
	margin: 0 0 1rem;
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--isp-fg-strong);
}

.isp-lead {
	margin: 0.75rem 0 0;
	color: var(--isp-muted);
	font-size: 0.95rem;
	line-height: 1.6;
}

@media (max-width: 600px) {
	.isp-heading {
		font-size: 1.4rem;
	}
}

.isp-muted {
	color: var(--isp-muted);
	font-size: 0.85rem;
}

/* 通知 */
.isp-error {
	margin: 0.75rem 0;
	padding: 0.875rem 1rem;
	color: var(--isp-error);
	background: var(--isp-error-soft);
	border: 1px solid var(--isp-error-border);
	border-radius: var(--isp-radius-sm);
	font-size: 0.9rem;
}

.isp-warning {
	margin: 1rem 0;
	padding: 0.875rem 1rem;
	color: var(--isp-warning);
	background: var(--isp-warning-soft);
	border: 1px solid var(--isp-warning-border);
	border-radius: var(--isp-radius-sm);
	font-size: 0.9rem;
}

/* フィールド */
.isp-field {
	margin: 1.5rem 0;
}

.isp-field:first-of-type {
	margin-top: 0;
}

.isp-field-label {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	margin-bottom: 0.6rem;
	font-weight: 600;
	color: var(--isp-fg);
	font-size: 0.95rem;
}

.isp-field-icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 1.3rem;
	height: 1.3rem;
	color: var(--isp-accent);
	flex-shrink: 0;
}

.isp-field-icon svg {
	width: 100%;
	height: 100%;
}

.isp-inline {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	flex-wrap: nowrap;
	white-space: nowrap;
}

/* 入力フィールド共通 */
.isp-container input[type="text"],
.isp-container input[type="number"],
.isp-container textarea,
.isp-container select {
	width: 100%;
	padding: 0.6rem 0.85rem;
	border: 1px solid var(--isp-border-strong);
	border-radius: var(--isp-radius-sm);
	font-size: 1rem;
	font-family: inherit;
	background: #ffffff;
	color: var(--isp-fg-strong);
	transition: border-color 0.15s, box-shadow 0.15s;
}

.isp-container input[type="text"]:focus,
.isp-container input[type="number"]:focus,
.isp-container textarea:focus,
.isp-container select:focus {
	outline: none;
	border-color: var(--isp-accent);
	box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.isp-container textarea {
	resize: vertical;
	min-height: 4.5rem;
}

.isp-container input[type="number"].isp-input-narrow {
	width: 7rem;
}

/* ボタン */
.isp-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.4rem;
	padding: 0.7rem 1.4rem;
	font-size: 0.95rem;
	font-family: inherit;
	font-weight: 600;
	border: 1px solid transparent;
	border-radius: var(--isp-radius-sm);
	cursor: pointer;
	transition: transform 0.1s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
	line-height: 1.2;
	letter-spacing: 0.01em;
}

.isp-btn:disabled {
	opacity: 0.5;
	cursor: not-allowed;
}

.isp-btn--primary {
	background: linear-gradient(135deg, var(--isp-accent), var(--isp-accent-strong));
	color: #ffffff;
	box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

.isp-btn--primary:hover:not(:disabled) {
	transform: translateY(-1px);
	box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.isp-btn--primary:active:not(:disabled) {
	transform: translateY(0);
	box-shadow: 0 2px 4px rgba(37, 99, 235, 0.25);
}

.isp-btn--ghost {
	background: #ffffff;
	color: var(--isp-fg);
	border-color: var(--isp-border-strong);
}

.isp-btn--ghost:hover:not(:disabled) {
	background: var(--isp-bg-soft);
	border-color: var(--isp-muted-soft);
}

.isp-btn--ghost:active:not(:disabled) {
	background: #f3f4f6;
}