/* ==============================================
   UPLOAD AREA & DROPZONE
   ============================================== */
.upload-area {
    border: 1.5px dashed color-mix(in srgb, var(--neon-primary) 35%, transparent);
    padding: 35px 15px;
    width: 100%;
    position: relative;
    overflow: hidden;
    text-align: center;
    cursor: pointer;
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--neon-primary) 3%, transparent);
    transition: all var(--transition);
}

.upload-area::before {
    position: absolute;
    inset: 0;
    opacity: 0;
    background: radial-gradient(circle at center, color-mix(in srgb, var(--neon-primary) 6%, transparent) 0%, transparent 70%);
    transition: opacity var(--transition);
    content: '';
}

.upload-area:hover::before {
    opacity: 1;
}

.upload-area:hover {
    border-color: var(--neon-primary);
    transform: translateY(-2px);
    box-shadow: var(--glow-xs);
}

/* ==============================================
   DRAG & DROP STATE
   ============================================== */
.card.dragover,
.upload-area.dragover {
    border-color: var(--neon-primary) !important;
    border-style: dashed !important;
    transform: scale(1.02);
    background: color-mix(in srgb, var(--neon-primary) 5%, transparent) !important;
    box-shadow: var(--glow-md) !important;
}

.upload-icon {
    margin: 0 auto;
    width: 90px;
    height: 90px;
}

.upload-icon svg,
.upload-icon app-icon {
    width: 100%;
    height: 100%;
    display: block;
    color: var(--neon-primary);
    opacity: 0.7;
    user-select: none;
    animation: float 3s ease-in-out infinite;
}

.upload-text {
    font-weight: 500;
    font-size: 1.35rem;
    color: var(--text-primary);
}

.upload-subtext {
    font-size: 1rem;
    color: var(--text-muted);
}

/* ==============================================
   STATE: ENTRANCE ANIMATIONS
   ============================================== */
.upload-area:not(.hidden) .upload-icon,
.upload-area:not(.hidden) .upload-text,
.upload-area:not(.hidden) .upload-subtext {
    animation: slideUpFade 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.upload-area:not(.hidden) .upload-icon {
    animation-delay: 0.1s;
}

.upload-area:not(.hidden) .upload-text {
    animation-delay: 0.2s;
}

.upload-area:not(.hidden) .upload-subtext {
    animation-delay: 0.25s;
}

.upload-area.hidden {
    margin: 0;
    border-color: transparent;
    padding: 0 15px;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: scale(1);
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.3s ease,
        padding 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.35s ease,
        border-color 0.3s ease,
        visibility 0.4s !important;
}

.upload-area:not(.hidden) {
    max-height: 600px;
    opacity: 1;
    visibility: visible;
    transform: scale(1) translateY(0);
    transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.3s ease 0.1s,
        padding 0.45s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1),
        box-shadow 0.35s ease;
}

@starting-style {
    .upload-area:not(.hidden) {
        margin: 0;
        border-color: transparent;
        padding: 0 15px;
        max-height: 0;
        opacity: 0;
        transform: scale(0.92) translateY(-15px);
    }
}

/* ==============================================
   ERROR & WARNING STATES
   ============================================== */
.upload-area.error,
.input-field.error,
.textarea.error {
    border-color: #f44336 !important;
    background: rgba(244, 67, 54, 0.05) !important;
    box-shadow: 0 0 15px rgba(244, 67, 54, 0.2) !important;
    animation: shake 0.5s cubic-bezier(.36, .07, .19, .97) both;
}

.upload-area.warning,
.input-field.warning,
.textarea.warning {
    border-color: #ffc107 !important;
    background: rgba(255, 193, 7, 0.05) !important;
    box-shadow: 0 0 15px rgba(255, 193, 7, 0.2) !important;
    animation: shake 0.5s cubic-bezier(.36, .07, .19, .97) both;
}

.upload-area.error .upload-icon,
.upload-area.error .upload-icon app-icon {
    color: #f44336 !important;
    opacity: 1;
}

.upload-area.error .upload-text {
    color: #f44336;
}

.upload-area.error .upload-subtext {
    color: #c62828;
}

.upload-area.warning .upload-icon,
.upload-area.warning .upload-icon app-icon {
    color: #ffc107 !important;
    opacity: 1;
}

.upload-area.warning .upload-text {
    color: #ffc107;
}

.upload-area.warning .upload-subtext {
    color: #c69100;
}

/* ==============================================
   FILE INFO BAR
   ============================================== */
.file-info-bar {
    border: 1px solid color-mix(in srgb, var(--neon-primary) 20%, transparent);
    padding: 10px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    background: color-mix(in srgb, var(--neon-primary) 6%, transparent);
    transition: opacity 0.3s ease, transform 0.3s ease, max-height 0.3s ease, margin 0.3s ease, padding 0.3s ease, display 0.3s allow-discrete;
}

.file-info-bar.d-none {
    display: none !important;
    opacity: 0;
}

@starting-style {
    .file-info-bar:not(.d-none) {
        transform: translateY(-10px);
        opacity: 0;
    }
}

/* ==============================================
   FILE LIST CONTAINER
   ============================================== */
.file-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.file-list:empty,
.file-list:has(> .d-none:only-child) {
    display: none;
}

/* ==============================================
   WORKSTATION TEXTAREA BASE
   ============================================== */
.workstation-panel textarea {
    border: 1px solid color-mix(in srgb, var(--neon-primary) 10%, transparent);
    padding: 15px;
    min-height: 100px;
    flex-grow: 0;
    flex-shrink: 0;
    flex-basis: auto;
    font-family: var(--font-mono);
    color: var(--text-primary);
    resize: none;
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    transition: flex-grow 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        min-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        background 0.3s ease,
        border-color 0.3s ease;
}

.workstation-panel textarea.has-content {
    min-height: 280px;
    flex-grow: 1;
}