:root {
    --primary: #4A90E2;
    --primary-light: #90CDF4;
    --primary-bg: #EBF8FF;
    --primary-border: #63B3ED;
    --success: #50E3C2;
    --bg: #050814;
    --card-bg: #FFFFFF;
    --text: #F7FAFC;
    --ob-bg-start: #050814;
    --ob-bg-end: #141E30;
    --ob-accent: #4A90E2;
    --ob-accent-soft: rgba(74, 144, 226, 0.25);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0 auto;
    padding: 12px 16px;
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    box-sizing: border-box;
    max-width: 1400px;
    width: 100%;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* 登入頁全螢幕無邊距 */
body:has(#login-section:not(.hidden)) {
    padding: 0;
    max-width: 100%;
    background-color: #ffffff;
}

html:has(#login-section:not(.hidden)) {
    background-color: #ffffff;
}

#login-section {
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #ffffff;
}

#login-section.hidden {
    display: none;
}

/* 全域 Loading 遮罩 */
#global-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

/* Loading 三步驟進度列 */
.loader-step {
    display: grid;
    grid-template-columns: 28px 1fr auto;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    margin-bottom: 6px;
    background: #f9f9f9;
    border-radius: 10px;
    font-size: 0.88em;
    transition: opacity 0.3s ease;
}

.loader-step-icon {
    font-size: 1.1em;
    text-align: center;
}

.loader-step-label {
    font-weight: 600;
    color: #555;
}

.loader-step-status {
    font-size: 0.82em;
    color: #aaa;
    text-align: right;
}


.loader-spinner {
    border: 5px solid #f3f3f3;
    border-top: 5px solid var(--primary);
    border-radius: 50%;
    width: 250px;
    height: 250px;
    animation: spin 1s linear infinite;
}

.loader-text {
    margin-top: 15px;
    font-weight: bold;
    color: var(--primary);
}

.logo {
    width: 100px;
}

.container {
    width: 90%;
    max-width: 1200px;
    min-width: 400px;
    margin-top: 40px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    padding: 14px;
    margin-bottom: 0px;
    text-align: center;
    box-sizing: border-box;
    transition: background 0.4s ease, box-shadow 0.4s ease;
}

.hidden {
    display: none;
}

h1,
h2 {
    margin: 0 0 16px 0;
    color: var(--text);
}

p {
    margin: 8px 0;
    color: #555;
}

.btn {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 10px;
    font-size: 1.1em;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
    width: 100%;
    max-width: 500px;
    margin-top: 5px;
}

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

.btn-success {
    background-color: #2ECC71;
}

.btn:disabled {
    background-color: #2f7a52;
    cursor: not-allowed;
}

.login {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 卡片內文一律使用深色文字，避免在白底上變成白字 */
.card,
.card h1,
.card h2,
.card h3,
.card p,
.card span,
.card small {
    color: #2C3E50;
}

/* ── Rainbow theme variants (for onboarding + dashboard) ── */
body.theme-red {
    --primary: #E53E3E;
    --primary-light: #FEB2B2;
    --primary-bg: #FFF5F5;
    --primary-border: #FC8181;
    --success: #FEB2B2;
    --bg: #FFF5F5;
    --card-bg: #FFFFFF;
    --text: #2C1810;
    --ob-bg-start: #FF6B6B;
    --ob-bg-end: #C53030;
}

body.theme-orange {
    --primary: #DD6B20;
    --primary-light: #FBD38D;
    --primary-bg: #FFF7ED;
    --primary-border: #F6AD55;
    --success: #FBD38D;
    --bg: #FFF7ED;
    --card-bg: #FFFFFF;
    --text: #2D1F0B;
    --ob-bg-start: #FDBA74;
    --ob-bg-end: #C05621;
}

body.theme-yellow {
    --primary: #ffb31c;
    --primary-light: #FAF089;
    --primary-bg: #FFFBEB;
    --primary-border: #F6E05E;
    --success: #FAF089;
    --bg: #FFFBEB;
    --card-bg: #FFFFFF;
    --text: #2C2A10;
    --ob-bg-start: #FDE68A;
    --ob-bg-end: #B7791F;
}

body.theme-green {
    --primary: #38A169;
    --primary-light: #9AE6B4;
    --primary-bg: #ECFDF5;
    --primary-border: #68D391;
    --success: #9AE6B4;
    --bg: #ECFDF5;
    --card-bg: #FFFFFF;
    --text: #143021;
    --ob-bg-start: #6EE7B7;
    --ob-bg-end: #047857;
}

body.theme-blue {
    --primary: #3182CE;
    --primary-light: #90CDF4;
    --primary-bg: #EBF8FF;
    --primary-border: #63B3ED;
    --success: #90CDF4;
    --bg: #EBF8FF;
    --card-bg: #FFFFFF;
    --text: #1A365D;
    --ob-bg-start: #60A5FA;
    --ob-bg-end: #2563EB;
}

body.theme-purple {
    --primary: #805AD5;
    --primary-light: #D6BCFA;
    --primary-bg: #F5F3FF;
    --primary-border: #B794F4;
    --success: #D6BCFA;
    --bg: #F5F3FF;
    --card-bg: #FFFFFF;
    --text: #322659;
    --ob-bg-start: #A78BFA;
    --ob-bg-end: #6B21A8;
}