:root {
    --primary: #21c87a;
    --primary-dark: #1a2b3a;
    --secondary: #232b3b;
    --accent: #ffd600;
    --card-bg: rgba(35, 43, 59, 0.85);
    --tab-bg: rgba(26, 34, 51, 0.85);
    --text: #fff;
    --muted: #b0b8c1;
    --success: #21c87a;
    --danger: #ff5252;
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.18);
    --glass-blur: blur(8px);
}

body {
    font-family: 'Roboto', Arial, sans-serif;
    background: linear-gradient(135deg, #1a2b3a 0%, #23404a 100%);
    margin: 0;
    padding: 0;
    color: var(--text);
    min-height: 100vh;
    background-attachment: fixed;
}

.header {
    background: var(--secondary);
    padding: 32px 0 24px 0;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.logo {
    font-size: 2.2rem;
    font-weight: bold;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    letter-spacing: 1px;
    transition: color 0.2s;
    padding-bottom: 25px;
}
.logo span {
    color: var(--accent);
    font-weight: 700;
}
.logo:hover {
    color: var(--accent);
}

.badge {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border-radius: 20px;
    padding: 7px 22px;
    font-size: 1rem;
    margin-bottom: 18px;
    font-weight: 500;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(33,200,122,0.13);
    transition: background 0.2s;
}
.badge:hover {
    background: #1bb16a;
}

.main-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 10px 0;
    color: #fff;
    letter-spacing: 1px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.10);
}

.subtitle {
    color: var(--muted);
    font-size: 1.15rem;
    margin-bottom: 32px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.features {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin: 32px 0 0 0;
    flex-wrap: wrap;
}

.feature-card {
    background: var(--card-bg);
    border-radius: 18px;
    padding: 28px 22px;
    width: 220px;
    text-align: center;
    box-shadow: var(--shadow);
    color: #fff;
    margin-bottom: 18px;
    backdrop-filter: var(--glass-blur);
    border: 1.5px solid rgba(33,200,122,0.08);
    transition: transform 0.18s, box-shadow 0.18s;
}
.feature-card:hover {
    transform: translateY(-6px) scale(1.04);
    box-shadow: 0 8px 32px 0 rgba(33,200,122,0.18);
    border-color: var(--primary);
}
.feature-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 12px;
    transition: color 0.2s;
}
.feature-card:hover i {
    color: var(--accent);
}
.feature-title {
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 1.15rem;
}
.feature-desc {
    color: var(--muted);
    font-size: 1rem;
}

.container {
    max-width: 900px;
    margin: 38px auto 0 auto;
    background: var(--tab-bg);
    border-radius: 22px;
    box-shadow: var(--shadow);
    padding: 36px 28px 28px 28px;
    backdrop-filter: var(--glass-blur);
    border: 1.5px solid rgba(33,200,122,0.07);
    animation: fadeIn 1.1s;
}

.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--muted);
    font-size: 1.13rem;
    padding: 14px 0;
    border-radius: 12px 12px 0 0;
    cursor: pointer;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    outline: none;
    box-shadow: none;
    border-bottom: 2.5px solid transparent;
}
.tab-btn.active {
    background: var(--card-bg);
    color: var(--primary);
    border-bottom: 2.5px solid var(--primary);
    box-shadow: 0 2px 12px rgba(33,200,122,0.08);
}
/* .tab-btn:focus {
    outline: 2px solid var(--accent);
} */

.tab-content {
    display: none;
    background: var(--card-bg);
    border-radius: 0 0 16px 16px;
    padding: 36px 24px 24px 24px;
    min-height: 260px;
    animation: fadeInTab 0.7s;
    box-shadow: 0 2px 12px rgba(33,200,122,0.07);
}
.tab-content.active {
    display: block;
    animation: fadeInTab 0.7s;
}
@keyframes fadeInTab {
    from { opacity: 0; transform: translateY(30px);}
    to { opacity: 1; transform: translateY(0);}
}

.upload-area {
    text-align: center;
    border: 2.5px dashed var(--primary);
    border-radius: 14px;
    padding: 38px 18px;
    background: rgba(33,200,122,0.07);
    margin-bottom: 24px;
    transition: background 0.2s, border-color 0.2s;
    position: relative;
}
.upload-area:hover, .upload-area:focus-within {
    background: rgba(33,200,122,0.13);
    border-color: var(--accent);
}
.upload-area i {
    font-size: 2.7rem;
    color: var(--primary);
    margin-bottom: 12px;
    transition: color 0.2s;
}
.upload-area:hover i {
    color: var(--accent);
}
.upload-area input[type="file"] {
    display: none;
}
.upload-label {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 1.08rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 16px;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px rgba(33,200,122,0.10);
    border: none;
    outline: none;
}
.upload-label:hover, .upload-label:focus {
    background: var(--accent);
    color: #222;
    box-shadow: 0 4px 16px rgba(255,214,0,0.13);
}

.upload-note {
    color: var(--muted);
    font-size: 1rem;
    margin-top: 10px;
}

.cards-row {
    display: flex;
    gap: 18px;
    margin-bottom: 18px;
    flex-wrap: wrap;
}

.result-card {
    flex: 1;
    background: rgba(26,34,51,0.96);
    border-radius: 14px;
    padding: 28px 16px;
    min-width: 220px;
    min-height: 120px;
    text-align: center;
    color: #fff;
    margin-bottom: 12px;
    box-shadow: 0 2px 12px rgba(33,200,122,0.07);
    border: 1.5px solid rgba(33,200,122,0.07);
    transition: box-shadow 0.18s, border-color 0.18s;
    backdrop-filter: var(--glass-blur);
}
.result-card:hover {
    box-shadow: 0 8px 32px 0 rgba(33,200,122,0.13);
    border-color: var(--primary);
}
.result-card i {
    font-size: 2.2rem;
    color: var(--muted);
    margin-bottom: 8px;
    transition: color 0.2s;
}
.result-card:hover i {
    color: var(--accent);
}
.result-title {
    font-size: 1.08rem;
    font-weight: 600;
    margin-bottom: 6px;
    letter-spacing: 0.2px;
}
.result-content {
    color: var(--muted);
    font-size: 1.5rem;
    margin-top: 6px;
    word-break: break-word;
}

.action-row {
    display: flex;
    gap: 18px;
    justify-content: flex-end;
    margin-top: 18px;
}

.action-btn {
    padding: 13px 32px;
    border: none;
    border-radius: 8px;
    font-size: 1.08rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px rgba(33,200,122,0.10);
    outline: none;
}
.action-btn.process {
    background: var(--success);
    color: #fff;
}
.action-btn.process:hover, .action-btn.process:focus {
    background: #1bb16a;
    box-shadow: 0 4px 16px rgba(33,200,122,0.13);
}
.action-btn.reset {
    background: var(--danger);
    color: #fff;
}
.action-btn.reset:hover, .action-btn.reset:focus {
    background: #d32f2f;
    box-shadow: 0 4px 16px rgba(255,82,82,0.13);
}

.footer {
    margin-top: 48px;
    text-align: center;
    color: var(--muted);
    font-size: 1rem;
    padding: 18px 0 12px 0;
    letter-spacing: 0.2px;
}

::-webkit-scrollbar {
    width: 8px;
    background: #1a2233;
}
::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 8px;
}

@media (max-width: 900px) {
    .features { flex-direction: column; align-items: center; }
    .cards-row { flex-direction: column; }
    .container { padding: 18px 4vw 18px 4vw; }
    .main-title { font-size: 2rem; }
    .header { padding: 22px 0 16px 0; }
}

@media (max-width: 600px) {
    .container { padding: 10px 2vw 10px 2vw; }
    .main-title { font-size: 1.3rem; }
/*     .feature-card { width: 95vw; } */
    .result-card { min-width: 0; }
}