:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --danger: #ef4444;
    --success: #10b981;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Be Vietnam Pro', sans-serif;
}

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

/* Background Effects */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.glow-1 {
    top: -10%;
    right: -5%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(99,102,241,0.6) 0%, rgba(99,102,241,0) 70%);
    animation: float 15s ease-in-out infinite alternate;
}

.glow-2 {
    bottom: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(236,72,153,0.5) 0%, rgba(236,72,153,0) 70%);
    animation: float 20s ease-in-out infinite alternate-reverse;
}

.glow-3 {
    top: 40%;
    left: 30%;
    width: 30vw;
    height: 30vw;
    background: radial-gradient(circle, rgba(16,185,129,0.3) 0%, rgba(16,185,129,0) 70%);
    animation: pulse 10s ease-in-out infinite alternate;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-50px, 50px) scale(1.1); }
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.3; }
    100% { transform: scale(1.2); opacity: 0.6; }
}

/* Container */
.container {
    width: 100%;
    max-width: 600px;
    padding: 2rem;
    z-index: 1;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #f8fafc, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.header h1 i {
    font-size: 2rem;
    color: var(--primary);
    -webkit-text-fill-color: initial;
}

.header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Glass Panel */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-panel:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.6);
}

/* Input Groups */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    color: var(--text-main);
}

/* Custom Select */
.custom-select-wrapper {
    position: relative;
}

.custom-select {
    appearance: none;
    -webkit-appearance: none;
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    color: white;
    font-size: 1rem;
    font-family: 'Be Vietnam Pro', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
}

.custom-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.custom-select option {
    background-color: var(--bg-dark);
    color: white;
    padding: 10px;
}

.select-icon {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: transform 0.3s ease;
}

.custom-select:focus + .select-icon {
    transform: translateY(-50%) rotate(180deg);
    color: var(--primary);
}

/* Textarea */
textarea {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    color: white;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    min-height: 120px;
    transition: all 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

textarea::placeholder {
    color: rgba(148, 163, 184, 0.5);
}

.char-count {
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Buttons */
.primary-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 1.25rem;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.primary-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--primary);
}

.primary-btn:hover::after {
    left: 100%;
}

.primary-btn:active {
    transform: translateY(0);
}

.primary-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.secondary-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 1px solid var(--glass-border);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Audio Panel */
.audio-panel {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    animation: slideUp 0.4s ease forwards;
}

.audio-panel h3 {
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.audio-panel h3 i {
    color: var(--success);
}

audio {
    width: 100%;
    height: 44px;
    border-radius: 8px;
    margin-bottom: 1.25rem;
}

audio::-webkit-media-controls-panel {
    background-color: var(--text-main);
}

/* Alerts */
.alert {
    margin-top: 1.5rem;
    padding: 1rem 1.25rem;
    border-radius: 12px;
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    animation: slideUp 0.3s ease forwards;
}

.alert.error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.alert i {
    margin-top: 0.2rem;
}

/* Utility */
.hidden {
    display: none !important;
}

footer {
    text-align: center;
    margin-top: 2.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer i {
    color: var(--danger);
    margin: 0 0.25rem;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 640px) {
    .container { padding: 1rem; }
    .glass-panel { padding: 1.5rem; }
    .header h1 { font-size: 2rem; }
}