@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
    --primary-blue: #0A84FF;
    --primary-gradient: linear-gradient(135deg, #0A84FF 0%, #7A5CFA 100%);
    --bg-color: #F7F8FA;
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-primary: #1C1C1E;
    --text-secondary: #8E8E93;
    --border-glass: rgba(226, 232, 240, 0.8);
    --shadow-soft: 0 12px 34px rgba(10, 132, 255, 0.08);
    --shadow-floating: 0 15px 30px rgba(0, 0, 0, 0.08);
    --radius-pill: 40px;
    --radius-card: 26px;
}

body {
    background-color: var(--bg-color);
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    margin: 0;
    padding-bottom: 95px;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    padding: 20px 16px;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    padding: 24px;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.dropzone-area {
    border: 2px dashed rgba(10, 132, 255, 0.35);
    background: rgba(255, 255, 255, 0.6);
    border-radius: 22px;
    padding: 32px 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dropzone-area:hover, .dropzone-area.dragover {
    background: rgba(10, 132, 255, 0.05);
    border-color: var(--primary-blue);
    transform: scale(0.99);
}

.upload-circle-icon {
    width: 68px;
    height: 68px;
    background: #EBF4FF;
    color: var(--primary-blue);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 14px;
}

.btn-primary-gradient {
    background: var(--primary-gradient);
    border: none;
    color: #FFF;
    font-weight: 600;
    border-radius: var(--radius-pill);
    padding: 14px 28px;
    width: 100%;
    box-shadow: 0 8px 24px rgba(10, 132, 255, 0.35);
    transition: all 0.2s ease;
}

.btn-primary-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(10, 132, 255, 0.45);
    color: #FFF;
}

.format-badge {
    background: #F1F4F9;
    border-radius: 12px;
    padding: 7px 14px;
    font-size: 13px;
    font-weight: 600;
    color: #4A5568;
    display: inline-block;
    margin: 4px;
}

.bottom-floating-nav {
    position: fixed;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 32px);
    max-width: 440px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: 35px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 8px 12px;
    box-shadow: var(--shadow-floating);
    z-index: 1050;
}

.nav-link-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 500;
}

.nav-link-item.active {
    color: var(--primary-blue);
}

.nav-link-item i {
    font-size: 20px;
    margin-bottom: 2px;
}

.nav-center-action {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: #FFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 8px 20px rgba(10, 132, 255, 0.4);
    margin-top: -24px;
    text-decoration: none;
    border: 3px solid #FFF;
}

.progress-circle {
    width: 140px;
    height: 140px;
    margin: 0 auto;
    position: relative;
}

.waveform-bars {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    gap: 4px;
}

.waveform-bars .bar {
    width: 4px;
    background: var(--primary-blue);
    border-radius: 4px;
    animation: waveMovement 1.2s ease-in-out infinite alternate;
}

@keyframes waveMovement {
    0% { height: 10px; }
    100% { height: 48px; }
}

/* ডার্ক মোড */
body.dark-mode {
    --bg-color: #121214;
    --card-bg: rgba(28, 28, 30, 0.95);
    --text-primary: #FFFFFF;
    --text-secondary: #A1A1A6;
    --border-glass: rgba(255, 255, 255, 0.1);
}
body.dark-mode .bottom-floating-nav {
    background: rgba(28, 28, 30, 0.95);
}
body.dark-mode .format-badge {
    background: #2C2C2E;
    color: #E5E5EA;
}