style.css

:root {
    --bg-dark: #0f0f13;
    --card-bg: rgba(26, 27, 35, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --accent-purple: #a855f7;
    --accent-purple-hover: #b86eab;
    --purple-glow: rgba(168, 85, 247, 0.22);
    --text-main: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.65);
    --font: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius-lg: 20px;
    --radius-md: 12px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 40px 20px;
    position: relative;
    overflow-x: hidden;
}

/* Ambient glow background effect */
.background-glow {
    position: fixed;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 650px;
    height: 650px;
    background: radial-gradient(circle, var(--purple-glow) 0%, rgba(15, 15, 19, 0) 70%);
    z-index: 0;
    pointer-events: none;
}

.app-container {
    width: 100%;
    max-width: 680px;
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header */
.header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(168, 85, 247, 0.12);
    border: 1px solid rgba(168, 85, 247, 0.3);
    padding: 8px 16px;
    border-radius: 30px;
    color: var(--accent-purple);
    font-weight: 600;
    font-size: 15px;
    letter-spacing: 0.02em;
}

.header h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(180deg, #ffffff 0%, rgba(255, 255, 255, 0.75) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.5;
    max-width: 520px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.step-badge {
    position: absolute;
    top: 20px;
    right: 24px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-purple);
    background: rgba(168, 85, 247, 0.1);
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid rgba(168, 85, 247, 0.2);
}

.card h2 {
    font-size: 20px;
    font-weight: 600;
}

/* Prerequisite box */
.prereq-box {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.03);
    border-left: 3px solid var(--accent-purple);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-muted);
}

.prereq-box a {
    color: var(--accent-purple);
    text-decoration: none;
    font-weight: 500;
}

.prereq-box a:hover {
    text-decoration: underline;
}

/* Form inputs */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    width: 100%;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 14px 44px 14px 16px;
    color: #ffffff;
    font-family: var(--font);
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-wrapper input:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.18);
}

.btn-clear {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
    padding: 4px;
    display: none;
}

.btn-clear:hover {
    color: #ffffff;
}

/* Options */
.options-grid {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.toggle-option {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-muted);
    user-select: none;
}

.toggle-option input {
    display: none;
}

.custom-checkbox {
    width: 20px;
    height: 20px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.3);
    position: relative;
    transition: all 0.2s ease;
}

.toggle-option input:checked + .custom-checkbox {
    background: var(--accent-purple);
    border-color: var(--accent-purple);
}

.toggle-option input:checked + .custom-checkbox::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 7px;
    width: 4px;
    height: 9px;
    border: solid #ffffff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Buttons */
.button-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 22px;
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    flex: 1;
    min-width: 200px;
}

.btn-primary {
    background: var(--accent-purple);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--accent-purple-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(168, 85, 247, 0.35);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.14);
    transform: translateY(-1px);
}

/* Generated URL Display */
.generated-url-box {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: rgba(0, 0, 0, 0.25);
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.generated-url-box label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.url-display {
    font-family: monospace;
    font-size: 13px;
    color: var(--accent-purple);
    word-break: break-all;
}

/* OBS Card */
.obs-instructions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.obs-step {
    background: rgba(0, 0, 0, 0.25);
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.step-number {
    width: 24px;
    height: 24px;
    background: var(--accent-purple);
    color: #ffffff;
    border-radius: 50%;
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.obs-step p {
    font-size: 13.5px;
    line-height: 1.4;
    color: var(--text-muted);
}

.code-badge {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 12px;
}

/* Preview Card */
.preview-frame-wrapper {
    width: 100%;
    height: 220px;
    border-radius: var(--radius-md);
    background: rgba(0, 0, 0, 0.4);
    border: 1px dashed rgba(255, 255, 255, 0.15);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.preview-frame-wrapper iframe {
    width: 512px;
    height: 196px;
    border: none;
    border-radius: 24px;
    background: transparent;
    z-index: 2;
    display: none;
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 14px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--accent-purple);
    color: #ffffff;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 8px 24px rgba(168, 85, 247, 0.4);
    opacity: 0;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease;
    z-index: 999;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Footer */
.footer {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

.footer a {
    color: var(--accent-purple);
    text-decoration: none;
}

@media (max-width: 600px) {
    .app-container {
        padding: 0 10px;
    }
    .card {
        padding: 20px;
    }
    .button-group {
        flex-direction: column;
    }
    .btn {
        min-width: 100%;
    }
}