/* ============================================================
   FileWorks — Core Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --color-bg:           #0a0e1a;
  --color-surface:      #111827;
  --color-surface-2:    #1a2235;
  --color-surface-3:    #1f2d42;
  --color-border:       #1e2d45;
  --color-border-light: #2a3a55;
  --color-primary:      #3b82f6;
  --color-primary-dark: #2563eb;
  --color-primary-glow: rgba(59, 130, 246, 0.20);
  --color-accent:       #6366f1;
  --color-accent-glow:  rgba(99, 102, 241, 0.18);
  --color-success:      #10b981;
  --color-warning:      #f59e0b;
  --color-danger:       #ef4444;
  --color-text:         #f0f4ff;
  --color-text-muted:   #8899bb;
  --color-text-faint:   #4a5a7a;
  --radius-sm: 6px; --radius-md: 12px; --radius-lg: 18px; --radius-xl: 24px; --radius-full: 9999px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.40);
  --shadow-glow: 0 0 32px rgba(59,130,246,0.15);
  --transition: 200ms cubic-bezier(0.4,0,0.2,1);
  --font-family: 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --nav-height: 64px; --max-w: 1200px; --max-w-tool: 860px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-family);background:var(--color-bg);color:var(--color-text);line-height:1.6;min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img,video{max-width:100%;display:block}
a{color:var(--color-primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--color-primary-dark)}
button{cursor:pointer;font-family:inherit}
ul{list-style:none}
input,select,textarea{font-family:inherit}

::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:var(--color-bg)}
::-webkit-scrollbar-thumb{background:var(--color-border-light);border-radius:var(--radius-full)}
::-webkit-scrollbar-thumb:hover{background:var(--color-primary)}

h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.25}
h1{font-size:clamp(2rem,5vw,3.2rem)}
h2{font-size:clamp(1.5rem,3vw,2.2rem)}
h3{font-size:clamp(1.15rem,2vw,1.5rem)}
h4{font-size:1.125rem}

.text-gradient{background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-accent) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

.container{max-width:var(--max-w);margin:0 auto;padding:0 20px}
.container-tool{max-width:var(--max-w-tool);margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.section--sm{padding:48px 0}
.hidden{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.nav{position:sticky;top:0;z-index:100;height:var(--nav-height);background:rgba(10,14,26,0.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--color-border)}
.nav__inner{max-width:var(--max-w);margin:0 auto;padding:0 20px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px}
.nav__logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.25rem;color:var(--color-text);text-decoration:none}
.nav__logo-icon{width:32px;height:32px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:white;font-size:16px;flex-shrink:0}
.nav__links{display:flex;align-items:center;gap:8px}
.nav__link{padding:8px 14px;border-radius:var(--radius-md);font-size:.9rem;font-weight:500;color:var(--color-text-muted);transition:all var(--transition);text-decoration:none}
.nav__link:hover,.nav__link.active{color:var(--color-text);background:var(--color-surface-2)}
.nav__menu-btn{display:none;background:none;border:none;color:var(--color-text);padding:8px;border-radius:var(--radius-sm)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-md);font-size:.9375rem;font-weight:600;border:none;transition:all var(--transition);white-space:nowrap;text-decoration:none;cursor:pointer;position:relative;overflow:hidden}
.btn:active{transform:scale(0.98)}
.btn-primary{background:linear-gradient(135deg,var(--color-primary),var(--color-accent));color:white;box-shadow:0 4px 20px rgba(59,130,246,0.35)}
.btn-primary:hover{box-shadow:0 6px 28px rgba(59,130,246,0.50);transform:translateY(-1px);color:white}
.btn-outline{background:transparent;border:1.5px solid var(--color-border-light);color:var(--color-text)}
.btn-outline:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-glow)}
.btn-ghost{background:var(--color-surface-2);color:var(--color-text-muted);border:1px solid var(--color-border)}
.btn-ghost:hover{background:var(--color-surface-3);color:var(--color-text)}
.btn-success{background:linear-gradient(135deg,var(--color-success),#0d9488);color:white;box-shadow:0 4px 20px rgba(16,185,129,0.30)}
.btn-success:hover{box-shadow:0 6px 28px rgba(16,185,129,0.45);transform:translateY(-1px);color:white}
.btn-danger{background:linear-gradient(135deg,var(--color-danger),#dc2626);color:white}
.btn-danger:hover{transform:translateY(-1px);color:white}
.btn-sm{padding:8px 16px;font-size:.875rem;border-radius:var(--radius-sm)}
.btn-lg{padding:16px 32px;font-size:1.05rem}
.btn-icon{padding:10px}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none!important;box-shadow:none!important}

.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:24px;transition:all var(--transition)}
.card--interactive{cursor:pointer}
.card--interactive:hover{border-color:var(--color-primary);transform:translateY(-2px);box-shadow:var(--shadow-card),var(--shadow-glow)}

.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.tool-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:20px 16px;cursor:pointer;transition:all var(--transition);text-decoration:none;display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.tool-card:hover{border-color:var(--color-primary);transform:translateY(-3px);box-shadow:0 8px 32px rgba(0,0,0,0.3),var(--shadow-glow)}
.tool-card__icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.tool-card__title{font-size:.9375rem;font-weight:700;color:var(--color-text);margin:0}
.tool-card__desc{font-size:.8125rem;color:var(--color-text-muted);line-height:1.45;margin:0}

.dropzone{border:2px dashed var(--color-border-light);border-radius:var(--radius-lg);padding:48px 24px;text-align:center;transition:all var(--transition);cursor:pointer;background:var(--color-surface);position:relative}
.dropzone:hover,.dropzone.drag-over{border-color:var(--color-primary);background:var(--color-primary-glow)}
.dropzone__icon{font-size:40px;margin-bottom:16px;opacity:.7}
.dropzone__title{font-size:1.0625rem;font-weight:600;margin-bottom:6px}
.dropzone__sub{font-size:.875rem;color:var(--color-text-muted)}
.dropzone input[type="file"]{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}

.file-list{display:flex;flex-direction:column;gap:8px}
.file-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-md);transition:all var(--transition)}
.file-item:hover{border-color:var(--color-border-light)}
.file-item__icon{font-size:20px;flex-shrink:0}
.file-item__name{flex:1;font-size:.875rem;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-item__size{font-size:.8125rem;color:var(--color-text-muted);flex-shrink:0}
.file-item__actions{display:flex;gap:6px;flex-shrink:0}
.file-item__btn{background:none;border:none;color:var(--color-text-muted);padding:4px 8px;border-radius:var(--radius-sm);font-size:14px;transition:all var(--transition);cursor:pointer}
.file-item__btn:hover{background:var(--color-surface-3);color:var(--color-text)}
.file-item__btn.danger:hover{background:rgba(239,68,68,0.15);color:var(--color-danger)}

.form-group{display:flex;flex-direction:column;gap:6px}
.form-label{font-size:.875rem;font-weight:600;color:var(--color-text-muted)}
.form-input,.form-select{background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:10px 14px;color:var(--color-text);font-size:.9375rem;transition:border-color var(--transition);width:100%}
.form-input:focus,.form-select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-glow)}
.form-select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238899bb' d='M6 8L0 0h12z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px;cursor:pointer}
.form-range{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:var(--radius-full);background:var(--color-border-light);outline:none;cursor:pointer}
.form-range::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:var(--color-primary);cursor:pointer;box-shadow:0 2px 8px rgba(59,130,246,0.5)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}

.progress-bar{width:100%;height:6px;background:var(--color-border-light);border-radius:var(--radius-full);overflow:hidden}
.progress-bar__fill{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-accent));border-radius:var(--radius-full);transition:width .3s ease;animation:progress-pulse 1.5s ease-in-out infinite}
@keyframes progress-pulse{0%,100%{opacity:1}50%{opacity:.75}}

.alert{display:flex;align-items:flex-start;gap:12px;padding:14px 18px;border-radius:var(--radius-md);font-size:.875rem;line-height:1.5}
.alert-success{background:rgba(16,185,129,.12);border:1px solid rgba(16,185,129,.25);color:#34d399}
.alert-error{background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.25);color:#f87171}
.alert-info{background:var(--color-primary-glow);border:1px solid rgba(59,130,246,.25);color:#93c5fd}
.alert-warning{background:rgba(245,158,11,.12);border:1px solid rgba(245,158,11,.25);color:#fbbf24}
.alert__icon{font-size:16px;margin-top:1px;flex-shrink:0}

.tool-page{padding:32px 0 80px}
.tool-header{margin-bottom:32px}
.tool-header__back{display:inline-flex;align-items:center;gap:6px;font-size:.875rem;color:var(--color-text-muted);margin-bottom:20px;transition:color var(--transition);text-decoration:none}
.tool-header__back:hover{color:var(--color-primary)}
.tool-header__icon{width:64px;height:64px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:30px;margin-bottom:16px}
.tool-header h1{font-size:clamp(1.5rem,4vw,2rem);margin-bottom:8px}
.tool-header__desc{font-size:1rem;color:var(--color-text-muted)}

.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.badge-primary{background:var(--color-primary-glow);color:var(--color-primary);border:1px solid rgba(59,130,246,.3)}
.badge-success{background:rgba(16,185,129,.12);color:var(--color-success);border:1px solid rgba(16,185,129,.3)}
.badge-privacy{background:rgba(16,185,129,.12);color:#34d399;border:1px solid rgba(16,185,129,.3)}

.section-label{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-faint);margin-bottom:16px}
.section-header{margin-bottom:40px}
.section-header h2{margin-bottom:10px}
.section-header p{color:var(--color-text-muted);font-size:1.0625rem}

.hero{padding:80px 0 60px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-80px;left:50%;transform:translateX(-50%);width:800px;height:400px;background:radial-gradient(ellipse at center,rgba(99,102,241,.12) 0%,transparent 70%);pointer-events:none}
.hero__eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:var(--color-surface-2);border:1px solid var(--color-border-light);border-radius:var(--radius-full);font-size:.8125rem;font-weight:600;color:var(--color-text-muted);margin-bottom:24px}
.hero h1{margin-bottom:20px;max-width:780px;margin-left:auto;margin-right:auto}
.hero__sub{font-size:clamp(1rem,2vw,1.2rem);color:var(--color-text-muted);max-width:560px;margin:0 auto 36px;line-height:1.65}
.hero__actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.hero__pills{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:40px}
.hero__pill{padding:6px 14px;background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-full);font-size:.8125rem;color:var(--color-text-muted)}

.category-header{display:flex;align-items:center;gap:12px;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--color-border)}
.category-header__icon{width:36px;height:36px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:18px}
.category-header h3{font-size:1rem;font-weight:700;letter-spacing:.03em}
.category-header p{font-size:.8125rem;color:var(--color-text-muted)}

.privacy-shield{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;background:rgba(16,185,129,.08);border:1px solid rgba(16,185,129,.2);border-radius:var(--radius-full);font-size:.8125rem;font-weight:600;color:#34d399}

.result-section{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px;text-align:center}
.result-section__icon{font-size:48px;margin-bottom:16px}
.result-section h3{margin-bottom:8px}
.result-section p{color:var(--color-text-muted);margin-bottom:24px}

.ad-container{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:12px;text-align:center;position:relative;overflow:hidden}
.ad-container__label{font-size:.6875rem;text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-faint);margin-bottom:8px;display:block}
.ad-container--banner{min-height:100px}
.ad-container--rectangle{min-height:250px}

.divider{height:1px;background:var(--color-border);margin:32px 0}

.steps{display:flex;flex-direction:column;gap:20px;counter-reset:step-counter}
.step{display:flex;gap:16px;padding:20px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);counter-increment:step-counter;align-items:flex-start}
.step-num{min-width:32px;height:32px;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.875rem;flex-shrink:0;color:white}
.step__content h4{font-size:.9375rem;margin-bottom:4px}
.step__content p{font-size:.875rem;color:var(--color-text-muted)}

.faq{display:flex;flex-direction:column;gap:12px}
details.faq-item{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden}
details.faq-item summary{padding:16px 20px;cursor:pointer;font-weight:600;font-size:.9375rem;display:flex;justify-content:space-between;align-items:center;list-style:none;transition:background var(--transition)}
details.faq-item summary:hover{background:var(--color-surface-2)}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary::after{content:'﹢';font-size:1.25rem;transition:transform var(--transition);flex-shrink:0}
details.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item__body{padding:0 20px 16px;font-size:.875rem;color:var(--color-text-muted);line-height:1.65}

.related-tools{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.related-tool{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);text-decoration:none;color:var(--color-text);font-size:.875rem;font-weight:600;transition:all var(--transition)}
.related-tool:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-glow)}
.related-tool__icon{font-size:20px}

.footer{border-top:1px solid var(--color-border);padding:48px 0 32px;color:var(--color-text-muted)}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer__brand h3{font-size:1.125rem;font-weight:800;color:var(--color-text);margin-bottom:10px}
.footer__brand p{font-size:.875rem;line-height:1.65}
.footer__col h4{font-size:.875rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--color-text-faint);margin-bottom:14px}
.footer__col a{display:block;font-size:.875rem;color:var(--color-text-muted);margin-bottom:10px;transition:color var(--transition)}
.footer__col a:hover{color:var(--color-primary)}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:.8125rem;padding-top:24px;border-top:1px solid var(--color-border)}
.footer__bottom p{color:var(--color-text-faint)}

.cookie-banner{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);width:calc(100% - 48px);max-width:760px;background:var(--color-surface-2);border:1px solid var(--color-border-light);border-radius:var(--radius-lg);padding:20px 24px;z-index:999;box-shadow:0 8px 48px rgba(0,0,0,0.5);display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.cookie-banner p{flex:1;font-size:.875rem;color:var(--color-text-muted);min-width:200px}
.cookie-banner p a{color:var(--color-primary)}
.cookie-banner__actions{display:flex;gap:10px;flex-shrink:0}

.spinner{width:40px;height:40px;border:3px solid var(--color-border-light);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto}
@keyframes spin{to{transform:rotate(360deg)}}

.processing-overlay{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:48px;text-align:center}
.processing-overlay p{color:var(--color-text-muted)}

.toast-container{position:fixed;bottom:24px;right:24px;z-index:9999;display:flex;flex-direction:column;gap:8px;pointer-events:none}
.toast{background:var(--color-surface-2);border:1px solid var(--color-border-light);border-radius:var(--radius-md);padding:12px 18px;font-size:.875rem;font-weight:500;box-shadow:var(--shadow-card);pointer-events:all;animation:toast-in .3s ease;max-width:360px}
.toast--success{border-color:rgba(16,185,129,.4);color:#34d399}
.toast--error{border-color:rgba(239,68,68,.4);color:#f87171}
.toast--info{border-color:rgba(59,130,246,.4);color:#93c5fd}
@keyframes toast-in{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fade-in .4s ease}
@keyframes fade-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.dragging{opacity:.5;border:2px dashed var(--color-primary)!important}
.drag-over-target{border-color:var(--color-accent)!important;background:var(--color-accent-glow)!important}
[data-draggable="true"]{cursor:grab}
[data-draggable="true"]:active{cursor:grabbing}
.tag{display:inline-flex;align-items:center;padding:3px 10px;background:var(--color-surface-2);border:1px solid var(--color-border);border-radius:var(--radius-full);font-size:.75rem;color:var(--color-text-muted)}
.no-scroll{overflow:hidden}
.nav-mobile-menu{display:none;position:fixed;top:var(--nav-height);left:0;right:0;background:var(--color-surface);border-bottom:1px solid var(--color-border);padding:16px;z-index:99;flex-direction:column;gap:4px}
.nav-mobile-menu.open{display:flex}
.nav-mobile-menu a{padding:12px 16px;border-radius:var(--radius-md);color:var(--color-text-muted);font-weight:500;transition:all var(--transition)}
.nav-mobile-menu a:hover{background:var(--color-surface-2);color:var(--color-text)}

@media(max-width:1024px){.footer__grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.section{padding:56px 0}.hero{padding:56px 0 40px}.tool-grid{grid-template-columns:repeat(2,1fr)}.form-row{grid-template-columns:1fr}.nav__links{display:none}.nav__menu-btn{display:flex;align-items:center}.footer__grid{grid-template-columns:1fr 1fr;gap:28px}.footer__brand{grid-column:1/-1}.cookie-banner{flex-direction:column;align-items:flex-start}}
@media(max-width:480px){.tool-grid{grid-template-columns:1fr}.container{padding:0 16px}.hero h1{font-size:1.75rem}.footer__grid{grid-template-columns:1fr}.hero__actions{flex-direction:column;align-items:stretch}.hero__actions .btn{text-align:center}}