/* Studio Converter Pro Suite - Stili unificati v5.2.3 */

:root {
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.15);
    --glass-highlight: rgba(255, 255, 255, 0.3);
    --glass-shadow: rgba(0, 0, 0, 0.35);
    --accent-glow: rgba(99, 102, 241, 0.6);
    --text-main: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.7);
}

/* --- BASE --- */
body {
    background: #050b14;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    overflow-x: hidden;
    padding-top: 70px;
    -webkit-tap-highlight-color: transparent;
    -webkit-text-size-adjust: 100%;
}

body::before,
body::after {
    content: '';
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    opacity: 0.6;
    animation: float 20s infinite ease-in-out;
}

body::before {
    background: radial-gradient(circle, #6366f1, transparent 70%);
    top: -100px;
    left: -100px;
}

body::after {
    background: radial-gradient(circle, #ec4899, transparent 70%);
    bottom: -100px;
    right: -100px;
    animation-delay: -10s;
}

/* --- NAVIGAZIONE --- */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 30px;
    height: 60px;
    box-sizing: border-box;
    z-index: 1000;
}

.nav-brand { font-weight: bold; font-size: 18px; color: #fff; }

.nav-links { display: flex; gap: 25px; }

.nav-item {
    color: var(--text-muted);
    cursor: pointer;
    transition: 0.3s;
    font-size: 15px;
    font-weight: 500;
    padding: 5px 0;
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-item:hover { color: #fff; }

.nav-item.active {
    color: #fff;
    text-shadow: 0 0 10px var(--accent-glow);
}

.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #6366f1;
    box-shadow: 0 0 10px #6366f1;
}

.nav-icon { display: none; }

/* --- TAB --- */
.tab-content {
    display: none;
    animation: fadeIn 0.4s ease;
    padding: 15px;
    max-width: 700px;
    margin: 0 auto;
}

.tab-content.active { display: block; }

/* --- HOME --- */
.hero-section { text-align: center; margin-top: 20px; }

.hero-title { font-size: 32px; margin: 0 0 10px 0; }

.subtitle { color: var(--text-muted); font-size: 15px; margin-bottom: 25px; }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.feature-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    padding: 20px 10px;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
}

.f-icon { font-size: 28px; margin-bottom: 10px; }

.feature-card h3 { margin: 0 0 5px 0; font-size: 14px; }

.feature-card p { margin: 0; font-size: 11px; color: var(--text-muted); }

/* --- CARD PRINCIPALI / DROPZONE --- */
.main-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    padding: 20px;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    border-top: 1px solid var(--glass-highlight);
    box-shadow: 0 20px 50px var(--glass-shadow);
    margin-top: 15px;
}

.dropzone {
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 25px 15px;
    text-align: center;
    cursor: pointer;
    transition: 0.3s;
    background: rgba(255, 255, 255, 0.02);
}

.dropzone:hover {
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.08);
}

.dropzone-icon { font-size: 36px; margin-bottom: 10px; }

.dropzone-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 5px;
    word-break: break-all;
}

.dropzone-sub { font-size: 12px; color: var(--text-muted); }

.options { margin-top: 20px; transition: 0.3s; }

label {
    display: block;
    margin-top: 15px;
    margin-bottom: 8px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}

select,
input[type="number"] {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.05);
    color: white;
    font-size: 14px;
    box-sizing: border-box;
    outline: none;
    appearance: none;
}

select {
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23FFFFFF%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.6%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 12px top 50%;
    background-size: 10px auto;
}

/* Campi numerici: nessuna freccia (spinner) nativa */
input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

select option { background-color: #0f172a; color: #ffffff; padding: 10px; }

select:focus,
input:focus {
    border-color: var(--accent-glow);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.3);
}

input[type="range"] {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    outline: none;
    -webkit-appearance: none;
    margin-top: 10px;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 0 10px var(--accent-glow);
    cursor: pointer;
}

/* --- BOTTONI --- */
.btn-row { margin-top: 20px; display: flex; gap: 10px; }

button {
    flex: 1;
    padding: 14px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    cursor: pointer;
    font-weight: 600;
    transition: 0.3s;
    font-size: 14px;
}

button:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-reset {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
}

.btn-convert {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.8), rgba(139, 92, 246, 0.8));
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

/* --- AUTH --- */
.auth-card,
.profile-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    padding: 25px;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    max-width: 350px;
    width: 100%;
    box-sizing: border-box;
    margin: 20px auto;
    box-shadow: 0 20px 50px var(--glass-shadow);
    text-align: center;
}

.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    background: rgba(0, 0, 0, 0.2);
    padding: 4px;
    border-radius: 10px;
}

.auth-tab {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
}

.auth-tab.active { background: rgba(255, 255, 255, 0.1); color: white; }

.auth-form h2 { margin-top: 0; margin-bottom: 15px; font-size: 18px; }

.auth-form input {
    width: 100%;
    padding: 12px;
    margin-top: 5px;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.05);
    color: white;
    box-sizing: border-box;
    outline: none;
    margin-bottom: 10px;
    text-align: left;
}

/* Password con occhiolino 👁️ */
.pw-wrap {
    position: relative;
    display: flex;
    align-items: center;
    margin-top: 5px;
    margin-bottom: 10px;
}

.auth-form .pw-wrap input {
    margin: 0;
    padding-right: 42px;
}

.pw-eye {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 17px;
    line-height: 1;
    padding: 8px;
    min-height: auto;
}

.pw-eye:hover { color: #fff; }

.profile-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    font-weight: bold;
    color: white;
    margin: 0 auto 15px;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-logout {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.4);
    width: 100%;
    padding: 14px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
}

/* --- IMPOSTAZIONI (sezione a parte) --- */
.settings-card {
    max-width: 480px;
    text-align: left;
    padding: 22px;
}

.settings-title {
    font-size: 18px;
    margin: 0 0 14px;
    text-align: center;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-wrap: wrap;
}

.setting-row:last-of-type { border-bottom: none; }

.setting-label { font-size: 14px; font-weight: 700; }

.setting-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}

.setting-value {
    font-size: 12px;
    color: var(--text-muted);
    max-width: 170px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.setting-value.has-folder { color: #86efac; }

.setting-btn {
    background: rgba(99, 102, 241, 0.25);
    border: 1px solid rgba(99, 102, 241, 0.55);
    color: #c7d2fe;
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}

.setting-btn:hover { background: rgba(99, 102, 241, 0.4); }

.setting-btn.ghost {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--glass-border);
    color: var(--text-muted);
}

.lang-switch {
    display: flex;
    gap: 4px;
    background: rgba(0, 0, 0, 0.25);
    padding: 4px;
    border-radius: 10px;
}

.lang-switch button {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 7px 16px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 12px;
    cursor: pointer;
}

.lang-switch button.active { background: #6366f1; color: #fff; }

.dl-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 6px;
}

.dl-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 12px;
}

.dl-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.dl-meta { color: var(--text-muted); font-size: 11px; white-space: nowrap; }

.dl-empty {
    color: var(--text-muted);
    font-size: 12px;
    text-align: center;
    padding: 12px;
}

/* --- MODALI --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1500;
    animation: fadeIn 0.3s ease;
}

.modal-card {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-top: 1px solid var(--glass-highlight);
    padding: 30px;
    border-radius: 20px;
    max-width: 320px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* --- TOAST --- */
.toast {
    position: fixed;
    right: 20px;
    bottom: 20px;
    max-width: 380px;
    background: rgba(99, 102, 241, 0.95);
    color: #fff;
    padding: 13px 20px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    z-index: 9999;
    animation: slideIn 0.3s ease;
    transition: opacity 0.3s ease, transform 0.3s ease;
    word-break: break-word;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.toast.hide {
    opacity: 0;
    transform: translateY(20px);
}

/* --- KEYFRAMES --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(50px, 50px) scale(1.1); }
    66% { transform: translate(-30px, 20px) scale(0.9); }
}

/* --- MOBILE / APP VIEW (schermo <= 768px: nav in basso, stile app) --- */
@media (max-width: 768px) {
    body {
        padding-top: 16px;
        padding-bottom: calc(78px + env(safe-area-inset-bottom));
    }

    .main-nav {
        top: auto;
        bottom: 0;
        height: calc(64px + env(safe-area-inset-bottom));
        padding: 0 4px env(safe-area-inset-bottom);
        flex-direction: column;
        justify-content: center;
        border-bottom: none;
        border-top: 1px solid var(--glass-border);
        box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.5);
    }

    .nav-brand { display: none; }

    .nav-links {
        width: 100%;
        justify-content: space-around;
        gap: 0;
    }

    .nav-item {
        flex-direction: column;
        font-size: 10px;
        gap: 3px;
        padding: 6px 0;
        min-height: 52px;
        justify-content: center;
        flex: 1;
        text-align: center;
        border-radius: 12px;
    }

    .nav-icon { display: block; font-size: 20px; line-height: 1; }

    .nav-text {
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .nav-item.active::after { display: none; }

    .nav-item.active {
        color: #fff;
        background: rgba(99, 102, 241, 0.18);
        text-shadow: none;
    }

    .tab-content { padding: 10px 14px 20px; }

    .hero-section { margin-top: 5px; }

    .hero-title { font-size: 26px; margin-bottom: 8px; }

    .subtitle { font-size: 14px; margin-bottom: 20px; }

    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
        gap: 10px;
    }

    .feature-card { padding: 16px 8px; border-radius: 14px; }

    .main-card { padding: 16px; border-radius: 18px; margin-top: 10px; }

    .dropzone { padding: 30px 15px; }

    .dropzone-icon { font-size: 40px; }

    .options select,
    .options input[type="number"],
    .auth-form input {
        font-size: 16px;
        padding: 13px;
    }

    button {
        padding: 15px;
        font-size: 15px;
        min-height: 48px;
    }

    .btn-row { gap: 10px; }

    .auth-card,
    .profile-card {
        max-width: 420px;
        width: 100%;
        padding: 22px 18px;
        margin: 10px auto;
    }

    .modal-overlay { align-items: flex-end; padding: 0; }

    .modal-card {
        max-width: none;
        width: 100%;
        border-radius: 24px 24px 0 0;
        border-bottom: none;
        padding: 28px 20px calc(24px + env(safe-area-inset-bottom));
    }

    .toast {
        left: 16px;
        right: 16px;
        max-width: 520px;
        margin: 0 auto;
        bottom: calc(84px + env(safe-area-inset-bottom));
        text-align: center;
    }

    #news-section h3 { font-size: 16px !important; }
}